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GB1480431A - Method of polishing diamonds - Google Patents

Method of polishing diamonds

Info

Publication number
GB1480431A
GB1480431A GB92/75A GB9275A GB1480431A GB 1480431 A GB1480431 A GB 1480431A GB 92/75 A GB92/75 A GB 92/75A GB 9275 A GB9275 A GB 9275A GB 1480431 A GB1480431 A GB 1480431A
Authority
GB
United Kingdom
Prior art keywords
facets
girdle
face
faces
gemstones
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB92/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TOYE GEMSTONES Ltd
Original Assignee
TOYE GEMSTONES Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TOYE GEMSTONES Ltd filed Critical TOYE GEMSTONES Ltd
Priority to GB92/75A priority Critical patent/GB1480431A/en
Priority to IE2781/75A priority patent/IE42227B1/en
Priority to SE7514619A priority patent/SE410267B/en
Priority to NO754366A priority patent/NO754366L/no
Priority to ZA00757966A priority patent/ZA757966B/en
Priority to CA242,458A priority patent/CA1062484A/en
Priority to DE19752558495 priority patent/DE2558495A1/en
Priority to BE163161A priority patent/BE837135A/en
Priority to IL48765A priority patent/IL48765A/en
Priority to DK593675A priority patent/DK593675A/en
Priority to BR7508745*A priority patent/BR7508745A/en
Priority to FI753698A priority patent/FI753698A/fi
Priority to AT990575A priority patent/AT340794B/en
Priority to LU74117A priority patent/LU74117A1/xx
Priority to IT70248/75A priority patent/IT1055720B/en
Priority to NL7515258A priority patent/NL7515258A/en
Priority to FR7540354A priority patent/FR2296503A1/en
Priority to ES1975217820U priority patent/ES217820Y/en
Priority to AU87996/75A priority patent/AU502807B2/en
Priority to JP51000728A priority patent/JPS5193495A/ja
Priority to CH1776A priority patent/CH593779A5/xx
Priority to NZ179674A priority patent/NZ179674A/en
Publication of GB1480431A publication Critical patent/GB1480431A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C17/00—Gems or the like
    • A44C17/001—Faceting gems

Landscapes

  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

1480431 Polishing gemstones TOYE GEMSTONES Ltd 18 Dec 1975 [2 Jan 1975 24 Oct 1975] 92/75 and 43735/75 Heading A3H A made diamond is polished by forming a table 11, three facetted faces 16 on the base 13. and facets 14 on the girdle 12. the inclination of the faces 16 to the table 11 being such that light entering the table 11 perpendicularly is internally reflected at a face 16 to the opposite corner 121 (Fig. 6) and back to the face 16 and thence out of the table 11. Each face 16 is convex and has facets 21, 22, and is at an angle of 25‹ to 40‹ to the table. The pyramidal base 13 may be truncated. The girdle 12 also has corner facets 15. The intermediate portion between the table 11 and the girdle 12 is formed with facets 17, 18, 19.
GB92/75A 1975-01-02 1975-01-02 Method of polishing diamonds Expired GB1480431A (en)

Priority Applications (22)

Application Number Priority Date Filing Date Title
GB92/75A GB1480431A (en) 1975-01-02 1975-01-02 Method of polishing diamonds
IE2781/75A IE42227B1 (en) 1975-01-02 1975-12-19 Impovements in or relating to methods of polishing diamonds
SE7514619A SE410267B (en) 1975-01-02 1975-12-23 GEMSTONE
NO754366A NO754366L (en) 1975-01-02 1975-12-23
ZA00757966A ZA757966B (en) 1975-01-02 1975-12-23 Improvements in or relating to methods of polishing diamonds
CA242,458A CA1062484A (en) 1975-01-02 1975-12-23 Methods of polishing diamonds
DE19752558495 DE2558495A1 (en) 1975-01-02 1975-12-24 CUT GEMSTONE AND METHOD OF ITS MANUFACTURING
BE163161A BE837135A (en) 1975-01-02 1975-12-29 IMPROVEMENTS IN PRECIOUS STONE POLISHING PROCESSES
IL48765A IL48765A (en) 1975-01-02 1975-12-29 Method of polishing gemstones
DK593675A DK593675A (en) 1975-01-02 1975-12-30 METHOD FOR GRINDING THE GEMSTONE
BR7508745*A BR7508745A (en) 1975-01-02 1975-12-30 IMPROVEMENTS IN OR RELATING TO PROCESSES FOR POLISHING DIAMONDS
FI753698A FI753698A (en) 1975-01-02 1975-12-30
AT990575A AT340794B (en) 1975-01-02 1975-12-30 METHOD OF GRINDING DIAMONDS OR DGL.
LU74117A LU74117A1 (en) 1975-01-02 1975-12-30
IT70248/75A IT1055720B (en) 1975-01-02 1975-12-31 POLISHING PROCEDURE FOR DIAMONDS AND SIMILAR
NL7515258A NL7515258A (en) 1975-01-02 1975-12-31 METHOD OF GRINDING GEMSTONES.
FR7540354A FR2296503A1 (en) 1975-01-02 1975-12-31 Polishing of diamonds - by forming table and odd number of faces converging to point on base
ES1975217820U ES217820Y (en) 1975-01-02 1975-12-31 GEMSTONE.
AU87996/75A AU502807B2 (en) 1975-01-02 1975-12-31 Polishing gemstones
JP51000728A JPS5193495A (en) 1975-01-02 1976-01-05
CH1776A CH593779A5 (en) 1975-01-02 1976-01-05
NZ179674A NZ179674A (en) 1975-01-02 1976-01-06 Cutting a gemstone: modified brilliant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB92/75A GB1480431A (en) 1975-01-02 1975-01-02 Method of polishing diamonds

Publications (1)

Publication Number Publication Date
GB1480431A true GB1480431A (en) 1977-07-20

Family

ID=9698267

Family Applications (1)

Application Number Title Priority Date Filing Date
GB92/75A Expired GB1480431A (en) 1975-01-02 1975-01-02 Method of polishing diamonds

Country Status (3)

Country Link
BE (1) BE837135A (en)
GB (1) GB1480431A (en)
ZA (1) ZA757966B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008136919A2 (en) * 2007-05-04 2008-11-13 Worldwide Diamond Trademarks Ltd. Triangular start shaped diamond having hearts and arrows pattern
WO2008136923A2 (en) * 2007-05-04 2008-11-13 Worldwide Diamond Trademarks Ltd. Triangular shaped diamond which displays hearts and arrows pattern

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008136919A2 (en) * 2007-05-04 2008-11-13 Worldwide Diamond Trademarks Ltd. Triangular start shaped diamond having hearts and arrows pattern
WO2008136923A2 (en) * 2007-05-04 2008-11-13 Worldwide Diamond Trademarks Ltd. Triangular shaped diamond which displays hearts and arrows pattern
WO2008136923A3 (en) * 2007-05-04 2009-02-12 Sundiamond Usa Corp Triangular shaped diamond which displays hearts and arrows pattern
WO2008136919A3 (en) * 2007-05-04 2009-02-12 Sundiamond Usa Corp Triangular start shaped diamond having hearts and arrows pattern

Also Published As

Publication number Publication date
BE837135A (en) 1976-04-16
ZA757966B (en) 1976-12-29

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee