Lab NotesGems & Gemology, Winter 1992, Vol.28, No. 4

Winter 1992 G&G; Lab Notes

Diamond with Etched Dislocation Channels Colored Diamond Crystal Set in a "Renaissance Ring" Synthetic Emerald Overgrowth on Faceted Beryls Used in Jewelry Pink Hydrogrossular Garnet Black Opal Freshwater Natural Pearl from Alabama Synthetic Green Quartz Color-Zoned Sapphire Durability of Diffusion-Treated Sapphire Yellow Sapphire with Unusual Fluorescence Synthetic Star Sapphire of Unusual Color Unusual Bicolor Zoisite To view the full section, download the PDF above.

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