Lab NotesGems & 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 To view the full section, download the PDF above.

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