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DIAMANT SYNTHETIQUE [1 record]
Record 1 - internal organization data 2004-11-18
Record 1, English
Record 1, Subject field(s)
- Gemmology
- Diamond Industry
Record 1, Main entry term, English
- synthetic diamond
1, record 1, English, synthetic%20diamond
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- man-made diamond 2, record 1, English, man%2Dmade%20diamond
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Synthetic diamond. A man-made diamond, produced either by subjecting carbon-bearing material such as graphite to high temperature and pressure or by the chemical vapor deposition (CVD) method. The Swedish company Allmana Svenska Elektriska Aktiebolaget (ASEA) is believed to have achieved the first repeatable synthesis of diamond in 1953, but their results were not published at the time; General Electric Company (GE) announced a successful synthesis of diamonds in 1954, followed by De Beers in 1959. Colors range from black to dark green, light green, red, yellow, blue, and colorless (Type IIa diamonds). Millions of carats of industrial-quality synthetic diamond are now manufactured annually using high pressure techniques; gem quality synthetic diamonds have been produced experimentally by De Beers Diamond Research Laboratories, General Electric Company ... 3, record 1, English, - synthetic%20diamond
Record 1, French
Record 1, Domaine(s)
- Gemmologie
- Industrie diamantaire
Record 1, Main entry term, French
- diamant de synthèse
1, record 1, French, diamant%20de%20synth%C3%A8se
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- diamant synthétique 2, record 1, French, diamant%20synth%C3%A9tique
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Les diamants synthétiques sont fabriqués à partir de graphite et d'isotopes de carbone. La méthode de fabrication de ces synthèses repose sur les conditions de cristallisation naturelles du diamant, c'est-à-dire des températures entre 1700 °C et 2760 °C avec 10 T/cm², et ce pendant plusieurs mois. 3, record 1, French, - diamant%20de%20synth%C3%A8se
Record number: 1, Textual support number: 2 CONT
[...] depuis 2003, la société américaine Génésis propose pour quelques milliers de dollars un diamant de synthèse jaune de 1,5 carat, forgé en trois jours et demi, comparable aux diamants naturels, mais trois fois moins cher. 4, record 1, French, - diamant%20de%20synth%C3%A8se
Record 1, Spanish
Record 1, Textual support, Spanish
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