CN107080335B - The processing method and its diamond of the bottom of even number arrow diamond, diamond is presented in inside - Google Patents

Abstract

The interior presents the bottom of the even-numbered arrow diamond, the diamond processing method and the diamond, wherein the diamond includes a crown, a girdle and a bottom, and the crown includes a table, N triangular facets, 2N upper girdle triangular faces and N The main crown surface, the bottom includes N/2 first prismatic sharpening surfaces, N/2 second prismatic sharpening surfaces and N bottom foot surfaces, N/2 first prismatic sharpening surfaces and N/2 second prismatic grilling surfaces are evenly arranged alternately with the grilling point as the center of the circle, where N is equal to 6, 8, 10, 12 or 14; the distance between N/2 first prismatic grilling surfaces and the lower waist circle The angle between them is less than the angle between the N/2 second prismatic sharpening surfaces and the lower girdle circle; the facets of the crown and the facets of the bottom are set so that the N main crowns are respectively connected to the N/ The 2 first prismatic grill surfaces and the N/2 second prismatic grill surfaces correspond up and down. The invention can increase the yield of diamonds by 5%-8%.

Description

Inside showing the bottom of the Even Arrows diamond, how the diamond is processed and its diamond

technical field

The invention relates to the field of jewelry, in particular to a bottom with even-numbered arrow diamonds inside, a diamond processing method and the diamond.

technical background

With the improvement of people's living standards, jewelry has been used more and more widely as people's ornaments, especially diamond ornaments. At present, for the processing of diamonds, it is mainly in accordance with the traditional complete symmetrical grinding method. For example, for the grinding method of the bottom (also called pavilion, the same below) of even-numbered arrows and even-numbered heart diamonds, there are mainly the following steps. The first step is Based on the lower girdle of the diamond and facing away from the crown, N/2 large cusps are polished at the first included angle; the second step is based on the N/2 large cusps, and the second Grind N/2 large grilled surfaces into N grilled surfaces at an included angle; the third step is based on the intersecting edges of two adjacent grilled surfaces, with the second included angle and the predetermined length to the two sides of the ribs. 2N bottom foot surfaces are ground sideways, where N is equal to 6, 8, 10, 12 or 14. In this way, the bottom of an even-numbered arrow and even-numbered heart diamond has been polished successfully. For example, if you want to polish the bottom of a Hearts and Arrows diamond, firstly grind out 4 large cusps at the first included angle; Grind 4 large grilled surfaces into 8 grilled surfaces; the third step is to grind 16 bottoms on both sides of the edge with the second included angle and predetermined length based on the edge where two adjacent grilled surfaces intersect Foot surface. The bottom grinding method of other even-numbered arrows and even-numbered heart diamonds is similar, such as the bottom grinding method of six-arrows and six-hearts diamonds, ten-arrows and ten-hearts diamonds, and twelve-arrows and twelve-hearts diamonds. For more than 100 years, the bottom of even-numbered arrows and even-numbered heart diamonds has been polished in this way in the industry.

The polishing of the crown of even-numbered arrows and even-numbered heart diamonds is also a perfect symmetry method, including the following steps. The first step is based on the upper waist circle of the waist, and N/2 transitions are polished at the third angle away from the bottom. The crown surface; in the second step, the N transitional crown surface is polished on the basis of the N/2 transitional crown surfaces with the third included angle, and a polygonal table is formed in the center of the crown surface at the same time; in the third step, the adjacent On the basis of the intersecting edges of the two transitional crowns, N triangular facets are polished toward the polygonal table; the fourth step is based on the remaining intersecting edges of the two adjacent transitional crowns, with the fifth included angle to the edge. There are also 2N upper girdle facets polished on both sides.

There is still room for improvement in the yield of diamonds processed by the above-mentioned grinding method for the bottom of even-numbered arrows and even-numbered heart diamonds.

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention provides the society with a bottom showing even-numbered arrow diamonds inside, a diamond processing method and diamonds that can improve the diamond yield.

The technical solution of the present invention is: provide a kind of processing method that presents the bottom of even-numbered arrow diamond to the society, comprising the following steps:

(311), taking the lower waist circle of the waist as the reference, and polishing N/2 sharpened surfaces at the first included angle in the direction away from the crown;

(312) Based on the first edge where two adjacent picket surfaces intersect, N bottoms are respectively polished on both sides of the first edge with the second included angle on the first predetermined length h1 of the first edge Foot surface, the remaining part of the grilled tip surface forms N/2 first prismatic grilled tip surfaces;

(313), facing each first edge, with the third included angle towards the direction of the intersection of the first edge and the lower waist circle, N/2 second prismatic sharpening surfaces are polished on the bottom foot surface;

where N is equal to 6, 8, 10, 12 or 14.

As an improvement to the present invention, the first included angle is selected between 40-42 degrees; the second included angle is selected between 41-43 degrees; the third included angle is selected between 40.5-42.5 degrees .

The present invention also provides a method for processing even-numbered arrow diamonds inside, comprising the following steps:

(10) Grinding the countertop;

(20) Grinding the waist;

(30), grinding the bottom;

(40), grinding the crown;

The sanded bottom includes,

(311), taking the lower waist circle of the waist as the reference, and polishing N/2 sharpened surfaces at the first included angle in the direction away from the crown;

(312) Based on the first edge where two adjacent picket surfaces intersect, N bottoms are respectively polished on both sides of the first edge with the second included angle on the first predetermined length h1 of the first edge Foot surface, the remaining part of the grilled tip surface forms N/2 first prismatic grilled tip surfaces;

(313), facing each first edge, with the third included angle towards the direction of the intersection of the first edge and the lower waist circle, N/2 second prismatic sharpening surfaces are polished on the bottom foot surface;

where N is equal to 6, 8, 10, 12 or 14.

As an improvement to the present invention, crown grinding includes,

(411), based on the upper waist circle of the waist, grind N transition surfaces at the fourth included angle in a direction away from the bottom, and form a table at the center of the N transition surfaces;

(412) Based on the second edge where two adjacent transitional surfaces intersect respectively, N triangular facets are polished according to the second predetermined length h2 with the fifth included angle in the direction of the upper waist circle of the second edge ;

(413), based on the remaining second edge, grind out 2N upper waist triangular surfaces on both sides of the second edge at the sixth included angle, and form N main crown surfaces; make the N main crown surfaces The upper and lower sides respectively correspond to the N/2 first prismatic grill surfaces and the N/2 second prismatic grill surfaces.

As an improvement to the present invention, the first predetermined length h1 accounts for 25%-10% of the total length of the first rib 391 .

As an improvement to the present invention, the second predetermined length h2 accounts for 40%-60% of the total length of the second rib 42 .

The present invention also provides a diamond with even number of arrows inside, the bottom of the diamond is polished by the above processing method.

The present invention also provides a diamond with an even number of arrows inside, including a crown, a girdle and a bottom, the crown includes a table, N triangular facets, 2N upper waist triangular faces and N main crowns, the bottom Including N/2 first prismatic grill surfaces, N/2 second prismatic grill surfaces and N bottom foot surfaces, N/2 first prismatic grill surfaces and N/2 second ribs Shaped grilled tops are evenly arranged with the grilled point as the center of the circle, where N is equal to 6, 8, 10, 12 or 14; the angle between N/2 first prismatic grilled faces and the lower waist circle is smaller than N/ The included angle between the 2 second prismatic grill surfaces and the lower girdle circle; the facets of the crown and the facets of the bottom are set so that the N main crowns are respectively connected with the N/2 first ribs The top and bottom sides correspond to the N/2 second prismatic top surfaces.

As an improvement to the present invention, the angle between the N/2 first prismatic grill surfaces and the lower waist circle is selected between 40-42 degrees; the angle between the N/2 second prismatic grill surfaces and the lower waist circle The angle between them is selected between 40.5-42.5 degrees.

The present invention adopts the grinding method that the included angle between the first prismatic grill surface and the lower waist circle is not equal to the angle between the second prismatic grill surface and the lower waist circle, and the first prismatic grill surface is polished The included angle is smaller than the included angle of grinding the second prismatic point, so that more volume of the second prismatic point is reserved, so that the yield of diamonds can be increased by 5%-8%.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the diamond after the table is polished according to the present invention.

Fig. 2 is a schematic diagram of the structure after polishing the waist on the basis of Fig. 1 .

Fig. 3 is a schematic diagram of the bottom structure of the present invention after polishing six grilled surfaces.

Fig. 4 is a schematic diagram after grinding two bottom foot surfaces on the basis of Fig. 3 .

Fig. 5 is a schematic diagram after grinding 12 bottom foot surfaces on the basis of Fig. 4 .

Fig. 6 is a schematic diagram after grinding a second prismatic grill surface on the basis of Fig. 5 .

Fig. 7 is a schematic diagram after grinding all the second prismatic grill surfaces on the basis of Fig. 6 .

Fig. 8 is a structural schematic diagram of polishing 12 transitional crowns according to the present invention.

FIG. 9 is a schematic diagram of polishing 12 triangular facets on the basis of FIG. 8 .

Fig. 10 is a schematic diagram of grinding out 24 upper waist triangular faces in Fig. 9 .

Fig. 11 is a structural schematic diagram of the superposition of the first coronal surface and the bottom surface in the first embodiment of the present invention.

Fig. 12 is a schematic structural view of the superposition of the second coronal surface and the bottom surface in the first embodiment of the present invention.

Fig. 13 is a schematic side view of the first embodiment of the present invention.

Fig. 14 is a schematic diagram of the bottom structure of the present invention after grinding four grilled surfaces.

Fig. 15 is a schematic diagram after grinding two bottom foot surfaces on the basis of Fig. 14 .

Fig. 16 is a schematic diagram after grinding 8 bottom foot surfaces on the basis of Fig. 15 .

Fig. 17 is a schematic diagram after grinding a second prismatic grill surface on the basis of Fig. 16 .

Fig. 18 is a schematic diagram after grinding all the second prismatic grill surfaces on the basis of Fig. 17 .

Fig. 19 is a structural schematic diagram of grinding 8 transitional crowns according to the present invention.

Fig. 20 is a schematic diagram of grinding out 8 triangular facets on the basis of Fig. 19 .

Fig. 21 is a schematic diagram of grinding out 16 upper waist triangular faces in Fig. 20 .

Fig. 22 is a structural schematic view of the superposition of the first coronal surface and the bottom surface of the second embodiment of the present invention.

Fig. 23 is a schematic structural view of the superposition of the second coronal surface and the bottom surface in the second embodiment of the present invention.

Fig. 24 is a schematic diagram of the actual effect of the first embodiment of the present invention.

Detailed ways

Please refer to Fig. 1 to Fig. 13, what Fig. 1 to Fig. 13 discloses is a kind of processing method that presents the bottom of even-numbered arrow diamond inside, comprises the following steps: The first embodiment is illustrated by polishing the diamond bottom of twelve arrows,

(311), taking the lower waist circle 21 of the waist 2 as a reference, and grinding out 6 sharpening surfaces 39 at a first included angle in a direction away from the crown 1;

(312), based on the first edge 391 where two adjacent picket surfaces 39 intersect, grind on both sides of the first edge 391 with the second included angle on the first predetermined length h1 of the first edge 391 There are 12 bottom foot surfaces 32, and the remaining part of the grilled tip surface 39 forms 6 first prismatic grilled tip surfaces 393;

(313), directly facing each first edge 391, with the third included angle towards the direction of the intersection of the first edge 391 and the lower waist circle 21, grind out 6 second prismatic sharpening surfaces on the bottom foot surface 32 (31).

Preferably, the first included angle is selected between 40-42 degrees; the second included angle is selected between 41-43 degrees; and the third included angle is selected between 40.5-42.5 degrees.

The present invention also provides a diamond with an even number of arrows inside, the bottom of the diamond is polished by the above-mentioned processing method.

Similarly, please refer to Fig. 1 to Fig. 13, Fig. 1 to Fig. 13 reveals a kind of processing method that presents even-numbered arrow diamonds inside, including the following steps:

(10), grinding the table top 101 (see Figure 1);

(20), grinding the waist 2 (see Figure 2);

(30), grinding the bottom 3;

(40), grinding the crown 1;

The sanded bottom includes,

(311), based on the lower waist circle 21 of the waist 2, and in the direction away from the crown 1, 6 sharpened surfaces 39 are polished at the first included angle (see Figure 3);

(312), based on the first edge 391 where two adjacent picket surfaces 39 intersect, grind on both sides of the first edge 391 with the second included angle on the first predetermined length h1 of the first edge 391 There are 12 bottom foot surfaces 32, and the remaining part of the top surface 39 forms six first prismatic top surfaces 393 (see Figure 4 and Figure 5);

(313), directly facing each first edge 391, with the third included angle towards the direction of the intersection of the first edge 391 and the lower waist circle 21, grind out 6 second prismatic sharpening surfaces on the bottom foot surface 32 31 (see Figures 6 and 7).

The present invention adopts a grinding method in which the angle between the first prismatic pick-up surface 393 and the lower waist circle 21 is not equal to the angle between the second prismatic pick-up surface 31 and the lower waist circle 21, and the first edge is polished The included angle of the shaped sharpening surface 393 is smaller than the included angle of polishing the second prismatic sharpening surface 31, so that more volume of the second prismatic sharpening surface 31 is reserved, so that the yield of diamonds can be improved by 5 %-8%.

Preferably, the crown grinding 1 includes,

(411), based on the upper waist circle 22 of the waist 2, grind out 12 transition surfaces 41 at the fourth included angle in a direction away from the bottom 3, and form a table top 101 at the center of the 12 transition surfaces 41 ( See Figure 8);

(412), respectively based on the second edge 42 where two adjacent transition surfaces 41 intersect, and with the fifth included angle in the direction of the upper waist circle 22 of the second edge 42, grind out 12 according to the second predetermined length h2 12 triangular facets (see Figure 9);

(413), based on the remaining second rib 42, grind out 24 upper waist triangular faces 13 on both sides of the second rib (42) at the sixth included angle, and form 12 main crown faces 14; Make the 12 main crown surfaces 14 respectively correspond up and down with the 6 first prismatic grill surfaces 393 and the 6 second prismatic grill surfaces 31 (see FIG. 10 ).

FIG. 11 is a schematic structural view of the superimposed crown surface and bottom surface of the first embodiment of the present invention, that is, a structural schematic view of the superimposed structure of FIG. 8 and FIG. 7 . Observing in the Gonggong mirror, it can show a very good effect of twelve arrows.

Fig. 12 is a schematic structural view of the superposition of the second crown surface and the bottom surface of the first embodiment of the present invention, that is, a structural schematic view of the superposition of Fig. 10 and Fig. 7 . Observing in the Gonggong mirror can show a better effect of twelve arrows.

Fig. 13 is a schematic side view of the first embodiment of the present invention.

Preferably, the first predetermined length h1 accounts for 25%-10% of the total length of the first rib 391 .

Preferably, the second predetermined length h2 accounts for 40%-60% of the total length of the second rib 42 .

The present invention also provides a diamond with even number of arrows inside, the bottom of the diamond is polished by the above processing method.

Please refer to Fig. 7, Fig. 10, Fig. 12 and Fig. 13, the present invention also provides a diamond with an even number of arrows inside, including a crown 1, a girdle 2 and a bottom 3, the crown 1 includes a table 101, 12 triangular Facets 12, 24 upper waist triangular faces 13 and 12 main crown faces 14, the bottom 3 includes 6 first prismatic pick-up faces 393, 6 prismatic pick-up faces 31 and 12 bottom foot faces 32 , 6 first prismatic grilling surfaces 393 and 6 second prismatic grilling surfaces 31 are evenly arranged alternately with the grilling point 34 as the center; the six first prismatic grilling surfaces 393 and the lower waist circle 21 The included angle is less than the included angle between the 6 second prismatic sharpening surfaces 31 and the lower girdle circle 21; the facets of the crown 1 and the bottom 3 are set so that the 12 main crowns 14 are respectively connected to the 6 The first prismatic pick-up surface 393 corresponds to the 6 second prismatic pick-up surfaces 31 up and down.

Preferably, the included angle between the six first prismatic grill surfaces 393 and the lower waist circle 21 is selected between 40-42 degrees; the angle between the six prismatic grill surfaces 31 and the lower waist circle (21) The angle is selected between 40.5-42.5 degrees.

Preferably, the first predetermined length h1 accounts for 25%-10% of the total length of the first rib 391 .

Preferably, the second predetermined length h2 accounts for 40%-60% of the total length of the second rib 42 .

In the present invention, the diamond cutting ratio is table width ratio: 56-62%; crown height ratio: 13-16%; girdle thickness ratio: 2-4%; pavilion depth ratio: 39-47%; total depth ratio: 57- 63%.

Preferably, the first included angle is selected between 40-42 degrees, the second included angle is selected between 41-43 degrees, the third included angle is selected between 40.5-42.5 degrees, and the The fourth included angle is selected between 30-37 degrees, the fifth included angle is selected between 15-25 degrees, and the sixth included angle is selected between 35-42 degrees.

Please refer to Fig. 14 to Fig. 23, Fig. 14 to Fig. 23 discloses another kind of processing method for the bottom of even-numbered arrow diamonds inside, including the following steps: it is the second embodiment of the present invention, the second embodiment is to polish eight Let's take the diamond bottom of Hearts of Arrows as an example to illustrate,

(311), taking the lower waist circle 21 of the waist 2 as a reference, and grinding out four sharpening surfaces 39 at a first included angle in a direction away from the crown 1;

(312), based on the first edge 391 where two adjacent picket surfaces 39 intersect, grind on both sides of the first edge 391 with the second included angle on the first predetermined length h1 of the first edge 391 There are 8 bottom foot surfaces 32, and the remaining part of the grilled tip surface 39 forms 4 first prismatic grilled tip surfaces 393;

(313), facing each first edge 391, with the third included angle towards the direction of the intersection of the first edge 391 and the lower waist circle 21, grind out 4 second prismatic grilled tops on the bottom foot surface 32 (31).

Preferably, the first included angle is selected between 40-42 degrees; the second included angle is selected between 41-43 degrees; and the third included angle is selected between 40.5-42.5 degrees.

The present invention also provides a diamond with an even number of arrows inside, the bottom of the diamond is polished by the above-mentioned processing method.

Similarly, please refer to Fig. 14 to Fig. 23. Fig. 14 to Fig. 23 disclose a processing method for even-numbered arrow diamonds inside, including the following steps:

(10), grinding the table top 101 (see Figure 1);

(20), grinding the waist 2 (see Figure 2);

(30), grinding the bottom 3;

(40), grinding the crown 1;

The sanded bottom includes,

(311), taking the lower waist circle 21 of the waist 2 as the reference, and grinding away from the crown 1 in the direction away from the crown 1, four sharpening surfaces 39 are polished at the first included angle (see Figure 14);

(312), based on the first edge 391 where two adjacent picket surfaces 39 intersect, grind on both sides of the first edge 391 with the second included angle on the first predetermined length h1 of the first edge 391 There are 8 bottom foot surfaces 32, and the remaining part of the top surface 39 forms four first prismatic top surfaces 393 (see Figure 15 and Figure 16);

(313), facing each first edge 391, with the third included angle towards the direction of the intersection of the first edge 391 and the lower waist circle 21, grind out 4 second prismatic grilled tops on the bottom foot surface 32 31 (see Figures 17 and 18).

The present invention adopts a grinding method in which the angle between the first prismatic pick-up surface 393 and the lower waist circle 21 is not equal to the angle between the second prismatic pick-up surface 31 and the lower waist circle 21, and the first edge is polished The included angle of the shaped sharpening surface 393 is smaller than the included angle of polishing the second prismatic sharpening surface 31, so that more volume of the second prismatic sharpening surface 31 is reserved, so that the yield of diamonds can be improved by 5 %-8%.

Preferably, the crown grinding 1 includes,

(411), taking the upper waist circle 22 of the waist 2 as a reference, grinding out 8 transition surfaces 41 at the fourth included angle in the direction away from the bottom 3, and forming a table top 101 at the center of the 8 transition surfaces 41 ( See Figure 19);

(412), respectively based on the second edge 42 where two adjacent transition surfaces 41 intersect, with the fifth included angle in the direction of the upper waist circle 22 of the second edge 42, grinding out 8 according to the second predetermined length h2 12 triangular facets (see Figure 20);

(413) Based on the remaining second rib 42, 16 upper waist triangular faces 13 are respectively polished to both sides of the second rib (42) at the sixth included angle, and 8 main crown faces 14 are formed; Make the eight main crown surfaces 14 respectively correspond up and down with the four first prismatic grill surfaces 393 and the four second prismatic grill surfaces 31 (see FIG. 21 ).

FIG. 22 is a schematic structural view of the superposition of the crown surface and the bottom surface of the first embodiment of the present invention, that is, a structural schematic view of the superposition of FIG. 18 and FIG. 19 . Observing in the Gonggong mirror, it can show a very good effect of eight arrows.

FIG. 23 is a schematic structural view of the superposition of the second coronal surface and the bottom surface of the first embodiment of the present invention, that is, the structural schematic view of the superposition of FIG. 18 and FIG. 21 . Observing in the Gonggong mirror can show a better effect of eight arrows.

Preferably, the first predetermined length h1 accounts for 25%-10% of the total length of the first rib 391 .

Preferably, the second predetermined length h2 accounts for 40%-60% of the total length of the second rib 42 .

The present invention also provides a diamond with even number of arrows inside, the bottom of the diamond is polished by the above processing method.

Please refer to Fig. 18, Fig. 21, Fig. 22 and Fig. 23, the present invention also provides a diamond with an even number of arrows inside, including a crown 1, a girdle 2 and a bottom 3, the crown 1 includes a table 101, 8 triangular Facets 12, 16 upper waist triangular faces 13 and 8 main crown faces 14, the bottom 3 includes 4 first prismatic pick-up faces 393, 4 second prismatic pick-up faces 31 and 8 bottom feet Surface 32, 4 first prismatic grilling surfaces 393 and 4 second prismatic grilling surfaces 31 are evenly arranged alternately with the grilling point 34 as the center; The angle between them is smaller than the angle between the four second prismatic pick-up surfaces 31 and the lower girdle circle 21; the facets of the crown 1 and the facets of the bottom 3 are set so that the eight main crowns 14 are respectively Corresponding to the four first prismatic grill surfaces 393 and the four second prismatic grill surfaces 31 up and down.

Preferably, the included angle between the four first prismatic grilling surfaces 393 and the lower waist circle 21 is selected between 40-42 degrees; the angle between the four second prismatic grilling surfaces 31 and the lower waist circle (21) The included angle is selected between 40.5-42.5 degrees.

Preferably, the first predetermined length h1 accounts for 25%-10% of the total length of the first rib 391 .

Preferably, the second predetermined length h2 accounts for 40%-60% of the total length of the second rib 42 .

In the present invention, the diamond cutting ratio is table width ratio: 56-62%; crown height ratio: 13-16%; girdle thickness ratio: 2-4%; pavilion depth ratio: 39-47%; total depth ratio: 57- 63%.

Preferably, the first included angle is selected between 40-42 degrees, the second included angle is selected between 41-43 degrees, the third included angle is selected between 40.5-42.5 degrees, and the The fourth included angle is selected between 30-37 degrees, the fifth included angle is selected between 15-25 degrees, and the sixth included angle is selected between 35-42 degrees.

As for the Six Arrows diamond and its processing method, the Ten Arrows diamond and its processing method, and the Fourteen Arrows diamond and its processing method, it is not difficult for readers to draw from the above records, so the description will not be repeated in this specification.

Claims (6)

1. A processing method at the bottom of an even-numbered arrow diamond in the interior, characterized in that: comprise the steps: (311), taking the lower waist circle (21) of the waist (2) as a reference, and grinding N/2 sharpening surfaces (39) at the first included angle in a direction away from the crown (1); (312), based on the first edge (391) where two adjacent picket surfaces (39) intersect, the second included angle is on the first predetermined length (h1) of the first edge (391), respectively N bottom foot surfaces (32) are ground on both sides of the first rib (391), and N/2 first prismatic top surfaces (393) are formed on the remaining part of the top surface (39); (313), directly facing each first edge (391), with the third included angle towards the intersection of the first edge (391) and the lower waist circle (21), grind N on the bottom foot surface (32) / 2 second prismatic steak noodles (31); where N is equal to 6, 8, 10, 12 or 14. 2. The method for processing the bottom of even-numbered arrow diamonds according to claim 1, characterized in that: the first included angle is selected between 40-42 degrees; the second included angle is selected between 41-43 degrees Select between; the third included angle is selected between 40.5-42.5 degrees. 3. A method for processing even-numbered arrow diamonds inside, comprising the steps of: (10), grinding the table (101); (20), grinding the waist (2); (30), grinding the bottom (3); (40), grinding the crown (1); It is characterized in that: the polished bottom includes, (311), taking the lower waist circle (21) of the waist (2) as a reference, and grinding N/2 sharpening surfaces (39) at the first included angle in a direction away from the crown (1); (312), based on the first edge (391) where two adjacent picket surfaces (39) intersect, the second included angle is on the first predetermined length (h1) of the first edge (391), respectively N bottom foot surfaces (32) are ground on both sides of the first rib (391), and the remaining part of the top surface (39) forms N first prismatic top surfaces (393); (313), directly facing each first edge (391), with the third included angle towards the intersection of the first edge (391) and the lower waist circle (21), grind N on the bottom foot surface (32) / 2 second prismatic steak noodles (31); where N is equal to 6, 8, 10, 12 or 14. 4. The method for processing even-numbered arrow diamonds inside according to claim 3, characterized in that: crown polishing (4) includes, (411), with the upper waist circle (22) of the waist (2) as the reference, N transition surfaces (41) are ground at the fourth angle in the direction away from the bottom (3), and N transition surfaces (41) are formed at the N transition The center of the surface (41) constitutes the table top (101); (412), based on the second edge (42) where two adjacent transitional surfaces (41) intersect respectively, with the fifth included angle in the direction of the upper waist circle (22) of the second edge (42), press grinding out N triangular facets (12) with a second predetermined length (h2); (413), based on the remaining second edge (42), grind out 2N upper waist triangular faces (13) on both sides of the second edge (42) at the sixth included angle, and form N main The crown surface (14); the N main crown surfaces (14) are respectively connected with the N/2 first prismatic sharpening surfaces (393) and the N/2 second prismatic sharpening surfaces (31) correspond up and down. 5. The method for processing a diamond with an even number of arrows inside according to claim 3 or 4, characterized in that: the first predetermined length (h1) is 25%-10% of the total length of the first rib (391). 6. The method for processing a diamond with an even number of arrows inside according to claim 4, characterized in that: the second predetermined length (h2) is 40%-60% of the total length of the second rib (42).