Lab Notes Gems & Gemology, Summer 1993, Volume 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
Natural-Color Black Cultured Pearl with an Unusual Surface
Pearl Care
Pearl Half
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