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- Bristol Diamonds are quartz crystals found in geodes and geological rock formations which occur in dolomitic conglomerate in the Avon Gorge in Bristol, England. Their origin lies in geological processes of the Triassic period, about 250 to 200 million years ago. The Bristol Diamonds became popular novelties for visitors to the spa at Hotwells, Bristol, during the eighteenth and nineteenth centuries. Diarist John Evelyn and travel writer Celia Fiennes were amongst those who described them. In popular culture they became a synonym for something bright but worthless. (en)
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- 13509 (xsd:nonNegativeInteger)
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- An example of Bristol Diamonds (en)
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- Colorless, white, purple, yellow, pink (en)
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- Transparent to nearly opaque (en)
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- Insoluble at STP; 1 ppmmass at 400 °C and 500 lb/in2 to 2600 ppmmass at 500 °C and 1500 lb/in2 (en)
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- Bristol Diamonds are quartz crystals found in geodes and geological rock formations which occur in dolomitic conglomerate in the Avon Gorge in Bristol, England. Their origin lies in geological processes of the Triassic period, about 250 to 200 million years ago. The Bristol Diamonds became popular novelties for visitors to the spa at Hotwells, Bristol, during the eighteenth and nineteenth centuries. Diarist John Evelyn and travel writer Celia Fiennes were amongst those who described them. In popular culture they became a synonym for something bright but worthless. (en)
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