(European Gemological Laboratory)

См. также в других словарях:

• European Gemological Laboratory (USA) — The European Gemological Laboratory (USA) or EGL USA is an independent gemstone grading organization. [http://www.eglusa.com/about.html Background] European Gemological Laboratory (USA) website, accessed MArch 5, 2007] Originally the EGL USA was… …   Wikipedia

• Gemological Institute of America — The Gemological Institute of America, or GIA, is a non profit institute dedicated to research and education in the field of gemology. The GIA is also well known for its gem identification and grading services, and developed the famous four Cs… …   Wikipedia

• Diamond clarity — Part of a series on Diamonds Material Material properties Crystallographic defects Formatio …   Wikipedia

• Gemstone — Jewels redirects here. For other uses, see Jewels (disambiguation). Precious Stone redirects here. For the James Bond character, see Hurricane Gold. For other uses, see Gemstone (disambiguation). A selection of gemstone pebbles made by tumbling… …   Wikipedia

• EGL — abbr. European Gemological Laboratory …   Dictionary of abbreviations

• Sapphire — For other uses, see Sapphire (disambiguation). Sapphire The 423 carat (85 g) blue Logan sapphire General Category Oxide mineral …   Wikipedia

• Synthetic diamond — Synthetic diamonds of various colors grown by the high pressure high temperature technique Synthetic diamond is diamond produced in a technological process; as opposed to natural diamond, which is created in geological processes. Synthetic… …   Wikipedia

• Yttrium — (pronEng|ˈɪtriəm) is a chemical element with symbol Y and atomic number 39. It is a silvery metallic transition metal chemically similar to the lanthanoids and has historically been classified as a rare earth element. Yttrium is almost always… …   Wikipedia

• Gary Roskin — Gary Roskin, G.G., FGAAs author of Photo Masters for Diamond Grading and over 30 years of professional laboratory diamond grading, supervising, training, monitoring, and reporting, Gary Roskin is recognized as one of the world’s most highly… …   Wikipedia

• Verneuil process — The Verneuil process, also called flame fusion, was the first commercially successful method of manufacturing synthetic gemstones, developed in 1902 by the French chemist Auguste Verneuil. It is primarily used to produce the ruby and sapphire… …   Wikipedia

• Diamond cut — This article is about diamond cut styles. For a broader discussion of decorative diamonds, see Diamond (gemstone). Part of a series on Diamonds Material …   Wikipedia