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EDITED BY USHA R BALAKRISHNAN - 432 Pages
the machine is equipped with one-speed polishing motor and with inside suction system
les méthodes de taille traditionnelles et modernes
Buying jade is a challenge because its value can vary significantly depending on its quality and treatment status
Engineered with renowned Japanese accuracy
Gemstone Buying Guide: How to Evaluate, Identify, Select & Care For Colored Gems, Third Edition Rolling Mills Manual EDITED BY USHA R BALAKRISHNANA concise yet comprehensive reference about colored gemstones with information on quality evaluation, price comparison, gem identification, cutting styles, treatments, fake stones, optical effects, gem care and geographic sources. There are 323 new color photos and several new gem species and varieties in this updated Third edition. Written for consumers and professionals, the Gemstone Buying Guide is a practical, well illustrated resource for buying,