DIAMONDS

• Colored diamonds

COLORED STONES

• Tourmaline from Paraíba, Brazil
• Fine tourmalines from Africa
• Green zoisite from East Africa
• Rare gemstones from Mont St.-Hilaire

ENHANCEMENTS

• Update on diffusion-treated sapphires
• Blue enhanced opal
• Irradiated green topaz

SYNTHETICS AND SIMULANTS

• Synthetic alexandrite gets new name
• More on hydrothermal synthetic beryls
• Colored CZ plentiful
• Rare laboratory-grown crystals
• Magnetic "pierceless earrings"
• Another chatoyant glass
• Novel crystal opal imitation
• Faceted synthetic quartzes
• Knischka synthetic rubies
• Synthetic blue and green sapphires grown by Czochralski pulling
• Titanium-doped synthetic pink sapphire
• Imitations of sugilite and other nontransparent gems
• Faceted colored YAG
• YAG as an "ornamental" material

INSTRUMENTATION

• Instrument for detecting diffusion treatment

Appears on pages 58-67