Lab Notes
Gems & Gemology, Spring 1991, Volume 27, No. 1

Spring 1991 G&G Lab Notes

Inscribed Alexandrite
Chalcedony "Turquoise" Color
Highly Conductive Blue Diamond
"Emerald" with Unusual Color Zoning
More Banded Lapis Lazuli
Moonstone and Iolite Beads
Pearls from Baja California
Uncommon Cultured Pearls
Period Jewelry
Synthetic Ruby "Manufactured" Mineral Specimen
Flux Grown Ruby
Diffused Star Sapphire Update
Synthetic Sapphire with Triangular Inclusions
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