Lab NotesGems & Gemology, Summer 1993, Vol. 29, No. 2

Summer 1993 G&G; Lab Notes

Treated Amber Extensive, Subtle Fracture Filling in a Diamond Iridescent "Dislocation" in a Diamond Mounted Diamonds Mistaken for Simulants Treated Green Diamond An Ancient Miniature Emerald Carving Euclase Colored by Chromium Odontolite Natural-Color Black Cultured Pearl with an Unusual Surface Pearl Care Pearl Half To view the full section, download the PDF above.

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