Spring 1991 G&G Lab Notes
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
To view the full section, download the PDF above.
