Lab Notes Gems & Gemology, Winter 1986, Volume 22, No. 4

Winter 1986 G&G Lab Notes

Amethyst with Brazil Twinning Visible without Polarized Light
Synthetic Amethyst with Inclusions Typical of Hydrothermal Origin
Andalusite with Growth Bands
Faceted Clinohumite
Saint Valentine's Diamond
Imitation Emerald: Synthetic Spinel-and-Glass Triplets
Synthetic Emerald with a "Breadcrumb" Inclusion
Imitation Lapis Lazuli
Eroded Natural Pearls
Imitation Pearls
Cat's-Eye Petalite
Pyrite in Quartz

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