Lab NotesGems & Gemology, Winter 1991, Volume 27, No. 4

Winter 1991 G&G; Lab Notes

A Large Chlorite Carving Treated-Color Diamond with Natural Radiation Stains Massive Grossularite Garnet Carving Heat-Damaged Jadeite Banded Lapis Lazuli Unusually Large Worked and Plugged Cultured Pearl Quartzite and Dolomite Bead Coated Sapphire Twinned Synthetic Sapphires To view the full section, download the PDF above.

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Winter 1991 G&G; Lab Notes