gemstones

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151. Attractive Tanzanian Chrysoberyl Heart.: Hard to find Chrysoberyl (Chrysoberyl) Heart 2.49cts from Tanzania (Tunduru); HTML, 15 Kb, -0001-11-30 00:00:00; /gemstones/natural-chrysoberyl-heart-2-49-faceted_ycb146hk
152. Stunning Color and Cut 11.7x10.8mm Chrysoberyl: Rare Chrysoberyl (Chrysoberyl) Oval 6.13cts from Tanzania (Tunduru); HTML, 15 Kb, -0001-11-30 00:00:00; /gemstones/natural-chrysoberyl-oval-6-13-faceted_ycb146dp
153. Certified Strong Change Alexandrite 1.79cts.: Rare Alexandrite (Chrysoberyl) Oval 1.79cts from Tanzania (Tunduru); HTML, 15 Kb, -0001-11-30 00:00:00; /gemstones/natural-alexandrite-oval-1-79-faceted_xax320bl
154. Russian Alexandrite, Malyshevskoye: Information about Russian alexandrite findings and mining in Malyshevskoye, Russia.; HTML, 29 Kb, 2008-07-31 07:34:54; /localities/alexandrite-locality-russia-malyshevskoye-deposit.html
155. Ceylon alexandrite, Horana: Information about Ceylon alexandrite findings and mining in Horana, Sri Lanka.; HTML, 29 Kb, 2008-07-31 07:35:14; /localities/alexandrite-locality-sri-lanka-western-province-horana.html
156. Alexandrite World Occurrences and Mining Localities: Directory of confirmed findings and current mining localities of alexandrite, cat´s eye and chrysoberyl gemstones; HTML, 34 Kb, 2008-07-31 07:32:37; /localities/index.html
157. Brazilian alexandrite, Hematita: Information about Brazilian alexandrite findings and mining in Hematita, Brazil.; HTML, 29 Kb, 2008-07-31 07:33:47; /localities/alexandrite-locality-brazil-minas-gerais-hematita.html
158. Alexandrite World Occurrences: Study of all the known historical and confirmed alexandrite deposits and mining operations; HTML, 56 Kb, 2008-07-20 13:01:37; /chapters/chapter6/index.html
159. Brazilian alexandrite, Teafilo Otoni: Information about Brazilian alexandrite findings and mining in Novo Cruzeiro, Brazil.; HTML, 30 Kb, 2008-07-31 07:34:05; /localities/alexandrite-locality-brazil-minas-gerais-teofilo-otoni.html
160. Alexandrite or Diaphanite?: An important study of alexandrite origin and the people involved in the discovery and the naming of alexandrite gemstone; HTML, 56 Kb, 2008-07-20 13:01:20; /chapters/chapter2/index.html
161. Alexandrite Buyer's Guide: Comprehensive guide for buying and evaluating alexandrite gemstones; HTML, 77 Kb, 2008-07-20 13:02:02; /chapters/chapter9/index.html
162. 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
163. The prophetic Russian stone - Alexandrite: History of discovering alexandrite gemstone and the affect it had on the stone's name and the gemstone's value; HTML, 40 Kb, 2008-07-20 13:00:46; /chapters/chapter1/index.html
164. The Alexandrite Effect: Discussion about the alexandrite effect as a non-color-constancy phenomenon from the color theory perspective; HTML, 42 Kb, 2008-07-20 13:01:34; /chapters/chapter5/index.html
165. Chrysoberyl Species and Variety: Information about the chrysoberyl mineral, it's properties, varieties and history; HTML, 65 Kb, 2008-07-20 13:01:25; /chapters/chapter3/index.html
166. Methods of Producing Synthetic Alexandrite: Information about melt and flux techniques used for the synthetic alexandrite manufacturing; HTML, 41 Kb, 2008-07-20 13:01:46; /chapters/chapter7/methods-of-producing-synthetic-alexandrite.html
167. Alexandrite substitutes at Alexandrite discussion forums | Alexandrite guide: Alexandrite substitutes at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-05-01 13:48:00; /discussion/post/alexandrite-substitutes-FRM-324-00004
168. Synthetic alexandrite identification at Alexandrite discussion forums | Alexandrite guide: Synthetic alexandrite identification at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-03-28 06:53:00; /discussion/topic/synthetic-alexandrite-identification-FRM-325
169. China Stone: HTML, 64 Kb, 2009-03-30 07:29:18; /directory/gemstone-dealers/china-stone-wdd-003-00030.html
170. color grading alexandrite at Alexandrite discussion forums | Alexandrite guide: color grading alexandrite at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-11-27 05:12:12; /discussion/post/-color-grading-alexandrite-FRM-167-00002
171. Gemstone cuts: Any forms or styles used in the fashioning of gemstones such as antique cut, brilliant cut, emerald cut, baguette, cabochon, rose cut, etc.; HTML, 23 Kb, 2008-07-20 13:04:32; /chapters/glossary/gemstone-cuts.html
172. Classic alexandrite story at Alexandrite discussion forums | Alexandrite guide: Classic alexandrite story at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2007-10-18 05:48:03; /discussion/post/classic-alexandrite-story-FRM-175-00001
173. 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
174. Is alexandrite the most expensive gemstone in the world? at Alexandrite discussion forums | Alexandrite guide: Is alexandrite the most expensive gemstone in the world? at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2013-04-09 07:24:45; /discussion/topic/is-alexandrite-the-most-expensive-gemstone-in-the--FRM-459
175. Understanding alexandrite prices, value and appraisal at Alexandrite discussion forums | Alexandrite guide: Understanding alexandrite prices, value and appraisal at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2007-02-18 16:03:56; /discussion/post/-understanding-alexandrite-prices-value-and-appraisal-FRM-162-00001
176. Hardness: The quality of resistance or property of minerals, gemstones, etc., which is determined by reference to an empirical scale of standard of minerals. Hardness is the resistance of a mineral offered to abrasion or scratching (scelerometric). The absolute har; HTML, 25 Kb, 2008-07-20 13:04:40; /chapters/glossary/hardness.html
177. What do I need to check before purchasing alexandrite gemstone?: First and foremost, we need to look at the quality and strength of the color change. A strong change where the colors are bright and attractive under any kind of light is most desirable. Many stones are either a beautiful green in daylight or a nice pinki; HTML, 26 Kb, 2008-07-29 08:12:28; /chapters/faq/what-do-i-need-to-check-before-purchasing-alexandrite-gemstone.html
178. 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
179. Angelica at Alexandrite discussion forums | Alexandrite guide: Angelica at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-09-07 08:23:09; /discussion/topic/angelica-FRM-351
180. How can I spot the difference between a natural and a synthetic alexandrite?: HTML, 26 Kb, 2008-07-29 08:11:26; /chapters/faq/how-can-i-spot-the-difference-between-a-natural-and-a-synthetic-alexandrite.html
181. alexandrite for sale at Alexandrite discussion forums | Alexandrite guide: alexandrite for sale at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-11-27 07:25:20; /discussion/post/-alexandrite-for-sale-FRM-168-00002
182. Browse gemstones tagged with color change gemstone at Alexandrite discussion forums | Alexandrite guide: Browse gemstones tagged with color change gemstone at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2010-01-09 14:40:33; /discussion/topic/browse-gemstones-tagged-with-color-change-gemstone-FRM-355
183. Alexandrite idenitifcation at Alexandrite discussion forums | Alexandrite guide: Alexandrite idenitifcation at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-11-21 20:09:15; /discussion/post/-alexandrite-idenitifcation-FRM-165-00005
184. Flux-fusion method: This is a technique used to make certain synthetic gemstones such as emerald, ruby, spinel, quartz, Alexandrite, YAG, etc., man-made crystals growing in a high melting solvent or flux. The material or composition of desired synthetic crystal (beryllium an; HTML, 24 Kb, 2008-07-20 13:04:23; /chapters/glossary/flux-fusion-method.html
185. Color change: There are four major methods of changing the colors of gemstones. These are surface painting or foiling the back, oiling, coating, impregnating, staining of porous stones, heat treatment, and irradiation by particles of atomic size and X-rays. The color c; HTML, 26 Kb, 2008-07-20 13:03:40; /chapters/glossary/color-change.html
186. Clarity grading: The classification of fashioned gemstones or diamonds according to their clarity using the standard nomenclature of terms: flawless, pure, clean, perfect (for top grade). VVS (very very slightly included), VS (very slightly included), SI (slightly include; HTML, 24 Kb, 2008-07-20 13:03:38; /chapters/glossary/clarity-grading.html
187. 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
188. Pegmatite: A light-colored, coarse-grained igneous rock from granite clan containing orthoclase, quartz, microline, mica, gemstones, and many ferromagnesian minerals resulting from slow solidification. Pegmatite is occurring place of many uncommon gem minerals such; HTML, 24 Kb, 2008-07-20 13:06:14; /chapters/glossary/pegmatite.html
189. Phenomenon: A special optical occurrence, or circumstance observed or are visible in certain gemstones such as chatoyancy, asterism, or play of color, adularescence, girasol, labradorescence, opalescence, schiller, etc.; HTML, 24 Kb, 2008-07-20 13:06:20; /chapters/glossary/phenomenon.html
190. Weight of gemstones and precious metals: A standard mass. The unit of weight of gemstones since 1913, is the international metric carat or decimally of them in points.; HTML, 23 Kb, 2008-07-20 13:07:44; /chapters/glossary/weight-of-gemstones-and-precious-metals.html
191. Needlelike (silk): Acicular a needle form of inclusions in gemstones.; HTML, 23 Kb, 2008-07-20 13:05:56; /chapters/glossary/needlelike-silk.html
192. Pala International: HTML, 64 Kb, 2009-03-30 07:51:42; /directory/gemstone-dealers/pala-international-wdd-003-00032.html
193. Vanadium: A very hard, light-gray, ductile, malleable, metallic element of the group V of the Periodic System with the symbol V. It is one of the 8 pigment metals responsible for color in gemstones such as beryl, sapphire (natural or synthetic). Used as a component; HTML, 24 Kb, 2008-07-20 13:07:28; /chapters/glossary/vanadium.html
194. Ultrasonic cleaning: A device for cleaning dirt and other foreign particles from gemstones and jewelry articles by subjecting them to ultrasonic vibrations immersed in water or other solvent. The articles must be free of stress flaws. Glass lenses and other bodies can be poli; HTML, 24 Kb, 2008-07-20 13:07:17; /chapters/glossary/ultrasonic-cleaning.html
195. Imitation: To result something of a genuine article or natural gemstone or simulate it from any material that imitate by its color, the appearance of a natural gemstone. Imitation gemstone having wholly different physical properties and chemical composition, and hen; HTML, 25 Kb, 2008-07-20 13:04:51; /chapters/glossary/imitation.html
196. Where can I test and appraise my alexandrite?: The most well known gemological laboratories are listed below and all of them are equipped to test alexandrite. Most gemological laboratories only identify gemstones, they do not appraise them.; HTML, 28 Kb, 2008-07-29 08:12:19; /chapters/faq/where-can-i-test-and-appraise-my-alexandrite.html
197. 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
198. Chatoyancy: An optical effect, possessed by certain translucent gemstones in reflecting light, in which a movable, wavy or silky sheen is concentrated in a narrow band of white light that changes its position, when the gem is turned. This is a characterized of cat's; HTML, 26 Kb, 2008-07-20 13:03:30; /chapters/glossary/chatoyancy.html
199. What is the best way to clean and take care of alexandrites?: With a hardness of 8.5, Alexandrite is a tough, hard, and durable gemstone that doesn't require any special attention. Still, even the hardest gemstones can shatter with a single well-placed blow so caution is always a good idea. Washing dishes with your; HTML, 25 Kb, 2008-07-29 08:11:53; /chapters/faq/what-is-the-best-way-to-clean-and-take-care-of-alexandrites.html
200. Where do the best alexandrite gemstones come from?: Although Russian alexandrites have the most historical value, fine stones are occasionally available from deposits in Brazil, India, Tanzania, Madagascar, and Sri Lanka. Unfortunately, there has been little production of alexandrites from any deposit in r; HTML, 26 Kb, 2008-07-29 08:11:44; /chapters/faq/where-do-the-best-alexandrite-gemstones-come-from.html

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