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211. Translucent: Gemstone transmits light but no object can be seen clearly through it such as moonstone. Translucent gemstones are not suitable for brilliant cutting but cut cabochon.; HTML, 23 Kb, 2008-07-20 13:07:07; /chapters/glossary/translucent.html
212. Alexandrite Forum Rules at Alexandrite discussion forums | Alexandrite guide: Alexandrite Forum Rules at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-09-02 18:16:22; /discussion/topic/alexandrite-forum-rules-FRM-153
213. 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, 2013-01-22 19:50:31; /discussion/post/is-alexandrite-the-most-expensive-gemstone-in-the-world-FRM-458-00001
214. Synthetic: Artificially made substance that has the same appearance, physical properties and chemical compound as its natural counterpart mineral. Some synthetic stones have no counterpart in nature they are synthetic gemstones except if they used as an imitation fo; HTML, 25 Kb, 2008-07-20 13:06:58; /chapters/glossary/synthetic.html
215. 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
216. 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
217. Colburn Earth Science Museum: HTML, 63 Kb, 2009-03-30 12:02:20; /directory/museums/colburn-earth-science-museum-wdd-003-00040.html
218. The Weinman Mineral Gallery: The museum features four main galleries: The Weinman Mineral Gallery, The Fossil Gallery, Science in Motion and The Collins Family My Big Backyard. A 120-seat digital planetarium and an observatory with a state-of-the-art 20-inch telescope will also be lo; HTML, 63 Kb, 2009-03-30 11:53:52; /directory/museums/the-weinman-mineral-gallery-wdd-003-00039.html
219. Spectroscope: A small hand optical device for obtaining and visually observing spectrum, in which collimated light passes through a narrow slit onto either a prism or diffraction grating, its spectrum being viewed by a lens system or telescope. The angle between the c; HTML, 24 Kb, 2008-07-20 13:06:53; /chapters/glossary/spectroscope.html
220. Physical properties: Physical properties of gemstones are extremely important in understanding geological phenomena in synthesizing new materials, and identification of minerals. Physical properties and chemical composition of minerals change with temperature and pressure. P; HTML, 24 Kb, 2008-07-20 13:06:22; /chapters/glossary/physical-properties.html
221. Jewel: A fashioned ornament for personal adornment, which is made of noble metals mounted with natural, synthetic, or imitation gemstones.; HTML, 23 Kb, 2008-07-20 13:05:05; /chapters/glossary/jewel.html
222. Why is natural alexandrite better than synthetic alexandrite?: Natural alexandrite is not better than synthetic alexandrite but natural alexandrite is very rare and uncommon in modern jewelry because it is hardly ever available and because it is too expensive for the general public to buy. Even lower quality more inc; HTML, 26 Kb, 2008-07-29 08:11:15; /chapters/faq/why-is-natural-alexandrite-better-than-synthetic-alexandrite.html

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