DIAMONDS

• New treatment plant at Alexander Bay
• Results of Canadian bulk sampling
• British Crown Jewels to move in 1994
• India plans increased mining
• Expansion at Jwaneng
• Diamonds from Myanmar
• Venetia mine officially opens
• Diamond-cutting plant in Vietnam

COLORED STONES

• Amber with insect "inclusion"
• More amber from Russia
• Blue chalcedony from Montana
• An unusual zoned specimen
• Diopside from Tanzania
• Ironstone matrix as a carving material
• Mansfieldite gemstone egg
• Pearls from Baja California
• Natural pearls from the New World
• Large South Seas pearl illustrated
• Pearl culturing in Venezuela
• Faceted ruby from Longido, Tanzania
• Sapphires from Madagascar
• Pennsylvania sphalerite
• Tourmaline with distinctive inclusions

ENHANCEMENTS

• Diffusion-treated sapphire cabochons sold as natural
• Kit with colored fracture filler
• Update on dyed green quartz
• New ruby treatment?

SYNTHETICS AND SIMULANTS

• New synthetic alexandrite
• Glass from Mount Saint Helens rock?
• Unusual assembled glass imitation
• Another assembled imitation crystal opal
• Natural-appearing synthetic rubies on the Thai-Myanmar border
• A new twist to imitations of Vietnamese ruby
• Assembled imitation bicolored tourmaline

IN MEMORIAM: Vahan Djevahirdjian

Appears on pages 198-208