gemstones

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161. Luminescence: The emission of certain visible wavelengths of light from a substance other than thermal process, which are used as diagnostic determination of gemstones. It is caused by the emission of photons, when an exited atom within the substance returns to the gro; HTML, 25 Kb, 2008-07-20 13:05:35; /chapters/glossary/luminescence.html
162. Is there a difference between Russian and Brazilian Alexandrite gemstones? at Alexandrite discussion forums | Alexandrite guide: Is there a difference between Russian and Brazilian Alexandrite gemstones? at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-03-19 22:26:42; /discussion/topic/is-there-a-difference-between-russian-and-brazilia-FRM-303
163. Re: Zandrite at Alexandrite discussion forums | Alexandrite guide: Re: Zandrite at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-03-28 12:20:00; /discussion/post/re-zandrite-FRM-324-00002
164. Nice Color Change Alexandrite Oval 7.46cts.: Extremely rare Alexandrite (Chrysoberyl) Oval 7.46cts from Tanzania (Tunduru); HTML, 15 Kb, -0001-11-30 00:00:00; /gemstones/natural-alexandrite-oval-7-46-faceted_XAX334aa
165. Gemstone: Any rough mineral or other material natural or synthetic, which possesses the necessary attractiveness, brilliance, beauty, rarity, color dispersion, refraction, color or colorless, flawless, portability, fashionably, and durability for use in gem industr; HTML, 25 Kb, 2008-07-20 13:04:30; /chapters/glossary/gemstone.html
166. American Gemological Laboratories: American Gemological Laboratories is a unit of Collectors Universe, the leading provider of value-added authentication and grading services for high-value collectibles and gemstones, which was founded in 1986 and publicly traded since 1999. In 1977, Ameri; HTML, 65 Kb, 2009-03-15 03:14:21; /directory/laboratories/american-gemological-laboratories-wdd-003-00020.html
167.: David Wein is an online fine jewelry store in association with Multicolour.com, the world´s most eclectic favourite online gemstone retailer. David Wein brings together an exquisite range of fine jewelry at exceptional value. Visitors will find an e; HTML, 63 Kb, 2009-03-15 00:14:55; /directory/jewelers/david-wein-wdd-003-00006.html
168. Alexandrite: Named after Russian Tsar Alexander II. A highly dichroic, rare variety of chrysoberyl. Emerald green in natural daylight, reddish in violet by artificial light, due to its unusual absorption properties. One of the hardest and most important gemstones. A f; HTML, 25 Kb, 2008-07-20 13:02:54; /chapters/glossary/alexandrite.html
169. David Wein: David Wein is an online fine jewelry store in association with Multicolour.com, the world´s most eclectic favourite online gemstone retailer. David Wein brings together an exquisite range of fine jewelry at exceptional value. Visitors will find an e; HTML, 64 Kb, 2009-03-15 01:14:43; /directory/jewelers/david-wein-wdd-003-00005.html
170. Re: Buying Alexandrite at Alexandrite discussion forums | Alexandrite guide: Re: Buying Alexandrite at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2007-08-02 15:09:15; /discussion/post/re-buying-alexandrite-FRM-134-00001

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