Diamonds DeBeers Announces World's Largest Synthetic Diamond Crystal China-Cut Diamonds Sold in Singapore Guyana Mining Development Colored Stones Possible Foreign Participation in Afghan Mining Novel Assembled Stone Black Coral Industry on the Mexican Caribbean Update on Sapphire Mining in Kanchanaburi Peace Pact for Colombian Emerald Region Unusual Color-Zoned Garnet Heavy Liquids Studied in Australia Black Cat's-Eye Opal Exceptionally Large White Opal Color-Change Cobalt Spinel Large Topaz Sculpture Cat's-Eye Bicolored Tourmaline More Gems from the USSR? Enhancements Diffusion-Treated Sapphire Update "Rainbow" Quartz: A New Enhancement Jade "Processing" Synthetics and Simulants Natural-Appearing Synthetic Cabochons Thailand Cutting CZ Glass Imitation Jadeite A Glass Imitation Pectolite? Dyed Quartz Imitation of Sugilite? To view the full section, download the PDF above.
Diamonds DeBeers Announces World's Largest Synthetic Diamond Crystal China-Cut Diamonds Sold in Singapore Guyana Mining Development Colored Stones Possible Foreign Participation in Afghan Mining Novel Assembled Stone Black Coral Industry on the Mexican Caribbean Update on Sapphire Mining in Kanchanaburi Peace Pact for Colombian Emerald Region Unusual Color-Zoned Garnet Heavy Liquids Studied in Australia Black Cat's-Eye Opal Exceptionally Large White Opal Color-Change Cobalt Spinel Large Topaz Sculpture Cat's-Eye Bicolored Tourmaline More Gems from the USSR? Enhancements Diffusion-Treated Sapphire Update "Rainbow" Quartz: A New Enhancement Jade "Processing" Synthetics and Simulants Natural-Appearing Synthetic Cabochons Thailand Cutting CZ Glass Imitation Jadeite A Glass Imitation Pectolite? Dyed Quartz Imitation of Sugilite? To view the full section, download the PDF above.
