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Alexandrite

Tsarstone collectors guide

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41. Gubelin Gemological Laboratories: Dr. Eduard J. Gubelin, one of the forefathers of modern gemology, and who was a Founding Organizing Member as well as an Honorary Member of the International Colored Gemstone Association (ICA), passed away in Lucerne, Switzerland in March at the age of 91; HTML, 66 Kb, 2009-03-15 03:05:18; /directory/laboratories/gubelin-gemological-laboratories-wdd-003-00017.html
42. Certified Strong Color Change Alexandrite: Extremely rare Alexandrite (Chrysoberyl) Oval 3.06cts from Asia (Andhra Pradesh); HTML, 15 Kb, -0001-11-30 00:00:00; /gemstones/natural-alexandrite-oval-3-06-faceted_yax588aa
43. What's the difference between a Valuation and Appraisal? at Alexandrite discussion forums | Alexandrite guide: What's the difference between a Valuation and Appraisal? at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-03-15 03:12:00; /discussion/post/what-s-the-difference-between-a-valuation-and-appraisal-FRM-280-00001
44. Certified Strong Change Alexandrite 26.75cts: Extremely rare Alexandrite (Chrysoberyl) Cushion 26.75cts from Tanzania (Tunduru); HTML, 15 Kb, -0001-11-30 00:00:00; /gemstones/natural-alexandrite-cushion-26-75-faceted_AX1159aa
45. Certified Natural 7.0mm Alexandrite 2.16cts.: Extremely rare Alexandrite (Chrysoberyl) Round 2.16cts from India (Deobhog area); HTML, 15 Kb, -0001-11-30 00:00:00; /gemstones/natural-alexandrite-round-2-16-faceted_yax409aa
46. Certified Natural Alexandrite Oval 1.09cts.: Rare Alexandrite (Chrysoberyl) Oval 1.09cts from India (Deobhog area); HTML, 15 Kb, -0001-11-30 00:00:00; /gemstones/natural-alexandrite-oval-1-09-faceted_yax469ad
47. Tanzanian alexandrite, Tunduru: Information about Tanzanian alexandrite findings and mining in Tunduru, Tanzania.; HTML, 29 Kb, 2008-07-31 07:35:25; /localities/alexandrite-locality-tanzania-tunduru.html
48. What makes natural alexandrite so expensive?: Alexandrite is an expensive gemstone because it so rare and production has always been limited. For years, the only source for alexandrite was Russia. In the last 20 or 30 years several new discoveries of alexandrite have been reported but production of s; HTML, 25 Kb, 2008-07-29 08:10:06; /chapters/faq/what-makes-natural-alexandrite-so-expensive.html
49. Where can I buy natural alexandrite gemstones?: Fine alexandrites or alexandrite jewelry can be purchased from jewelers specializing in colored gemstones, at trade shows, from TV sellers, at high end jewelry auctions, or online from websites specialized in alexandrite. You would be unlikely to find a h; HTML, 25 Kb, 2008-07-29 08:12:01; /chapters/faq/where-can-i-buy-natural-alexandrite-gemstones.html
50. Spectrum: Any array of electromagnetic visible light ordered according to its constituent wavelengths or colors, when the white light is dispersed by a prism or diffraction grating, ranging from about 750 to about 400 nm. The spectra can obtained by means of spectr; HTML, 27 Kb, 2008-07-20 13:06:54; /chapters/glossary/spectrum.html

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