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Alexandrite

Tsarstone collectors guide

gemstones

181. 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
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182. Synthetic alexandrite identification at Alexandrite discussion forums | Alexandrite guide
Synthetic alexandrite identification at Alexandrite discussion forums | Alexandrite guide
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183. SSEF
SSEF laboratory offers analysis of precious stones and issue test reports for diamonds, coloured stones and pearls. It was recognized in 1978 by the International Confederation of Jewellers and Goldsmiths (CIBJO and also a member of the International Colo
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184. Natural Alexandrite Ring at Alexandrite discussion forums | Alexandrite guide
Natural Alexandrite Ring at Alexandrite discussion forums | Alexandrite guide
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185. 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
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186. Angelica at Alexandrite discussion forums | Alexandrite guide
Angelica at Alexandrite discussion forums | Alexandrite guide
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187. The Gem and Jewelry Institute of Thailand
IT Gem Testing Laboratory (GIT-GTL), has been accredited by The World Jewellery Confederation (CIBJO) as the CIBJO Registered Laboratory since May 2000.
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188. Hong Kong Gems Laboratory
Established in 1987, Hong Kong Gems Laboratory is well equipped and recognized by gemologists and industry professionals. Full-service lab offers FTIR spectrophotometerservice, which provides evidence for jadeite jade and diamond, corundum, emerald and ot
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189. 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
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190. Colour change garnet, Malaia garnet and malaya garnet at Alexandrite discussion forums | Alexandrite guide
Colour change garnet, Malaia garnet and malaya garnet at Alexandrite discussion forums | Alexandrite guide
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191. 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
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192. GemResearch Swisslab
Private gemological research company focused on the characterization of high-quality gems from newly opened mines.
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193. How can I add my gemstone? at Alexandrite discussion forums | Alexandrite guide
How can I add my gemstone? at Alexandrite discussion forums | Alexandrite guide
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194. What is the difference between chrysoberyl and alexandrite? at Alexandrite discussion forums | Alexandrite guide
What is the difference between chrysoberyl and alexandrite? at Alexandrite discussion forums | Alexandrite guide
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195. Alexandrite of Brésilia at Alexandrite discussion forums | Alexandrite guide
Alexandrite of Brésilia at Alexandrite discussion forums | Alexandrite guide
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196. 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
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197. Re: Browse gemstones tagged with color change gemstone at Alexandrite discussion forums | Alexandrite guide
Re: Browse gemstones tagged with color change gemstone at Alexandrite discussion forums | Alexandrite guide
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198. 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
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199. Alexandrite Gemstone Collectors Guide, Alexandrite gemstones gallery and Alexandrite mining information at Alexandrite discussion forums | Alexandrite guide
Alexandrite Gemstone Collectors Guide, Alexandrite gemstones gallery and Alexandrite mining information at Alexandrite discussion forums | Alexandrite guide
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200. Re: Are there any other gemstones which change color? at Alexandrite discussion forums | Alexandrite guide
Re: Are there any other gemstones which change color? at Alexandrite discussion forums | Alexandrite guide
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