Spring 1999 Gem News International
Diamonds
Fashioned Diamonds from the Ekati Mine, Northwest Territories, Canada
Synthetic Diamonds Widely Available
Colored Stones and Organic Materials
Cat’s-Eye Andradite from San Benito County, California
An “Enhydro” Emerald from Colombia
Abundant Eudialyte
New Cuts for Oregon Sunstone
Near-Colorless Forsterite
“Watermelon Garnet”
New Deposits in India and Nepal
Iolite and Other Gems from Canada
Jasper “Planets”
Opal in Matrix from Brazil
White and Pastel Chinese Freshwater Cultured Pearls
Drusy Quartz “Leaves”
Twelve-Rayed Star Quartz from Sri Lanka
New Finds of Spessartine in Brazil
Treatments
“Blatant” Dyed Pearls
Synthetics and Simulants
Fused Silica Glass, Sold as “Cultured Snow Quartz”
Blue Slag Glass from Sweden, Resembling Opal
Imitation “Chinese Freshwater” Cultured Pearls
Synthetic Zincite Possibly Represented as Sphalerite
Miscellaneous
Drill Holes as Design Elements: Michael M. Dyber and “Luminaires”
Using Mineralogical Techniques to Solve Gemological Problems
Part 1: Internal “Becke Lines” in Spinel
Part 2: “Plato Lines” and Growth Structures In Synthetic Corundum
Announcements
Nature of Diamonds at the San Diego Natural History Museum
New Exhibit at the Royal Ontario Museum
International Colored Gemstone Association Congress
International Gemological Symposium
International Society of Appraisers Conference
Gemstones in Upcoming Scientific Meetings
To view the full section, download the PDF above.