Spring 1990 Gem News International
Beryl Triplet Cabochons
Diffusion-Treated Corundum
Star Ekanite
Cat's-Eye Iolite
Mother-of-Pearl Cameos
Dyed Green Quartzite
New World Sapphires
Cat's-Eye Spinel
Red Taaffeite
Treated Paraiba Tourmalines
Tanzanian Zircon
Diamonds
Filled Diamond Update
Computer Technology Enhances New Diamond Sorter
Kimberlites Discovered in Canada
Israeli-Japanese Joint Diamond-Polishing Venture
Ghana Considers Private Mining
Australians Develop New Technology for Diamond Exploration
Colored Stones
New Amethyst Discovery in the Eastern United States
Beryl Discovery in Finland
New Find of Orthoclase
California Star Quartz
East African Spinels
Oregon Sunstone Update
Largest Known Faceted Liddicoatite Tourmaline Reportedly Found in Brazil
Unusual Iridescent Zircon
Synthetics and Simulants
Glass Imitation Emerald Crystal
New Synthetic Ruby
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