DIAMONDS

• Botswana produces large diamond
• De Beers now marketing high-quality, high-pressure synthetic diamond products...
• ...and De Beers CVD industrial synthetic diamond products
• "Flanders Brilliant" cut debuts in U.S.
• Sakha (Yakutia) building up diamond reserves
• Venezuela diamond production up

COLORED STONES

• Blue cancrinite from Greenland
• "Emerald matrix" from North Carolina
• Gemstone globe and maps
• Lapidary art
• Banded iridescent obsidian
• Gems from Orissa, India
• Cultured freshwater pearls from Hanoi, Vietnam
• Peridot from Zabargad Island
• Ornamental porphyry from Canada
• Natural resin from Colombia
• Ruby mining near Mahenge, Tanzania

ENHANCEMENTS

• Opticon follow-up
• Turquoise treatment stability

SYNTHETICS AND SIMULANTS

• Synthetic corundum as a topaz simulant
• Russian flux-grown synthetic emeralds
• Novel opal simulants
• More on plastic imitation opal
• "Synthetic opal" from Russia
• More on Paraiba tourmaline simulants
• Color-zoned synthetic blue quartz
• Nontransparent synthetic quartz
• Synthetic spinel from eastern Germany

ANNOUNCEMENTS

Appears on pages 130-141