Lab Notes Gems & Gemology, Fall 1989, Volume 25, No. 3

Fall 1989 G&G Lab Notes

Imitation "Black Onyx" Chalcedony
Diamond with a Concave Table
Engraved Faceted Diamond Tablet
Diamond with Mysterious Wear
Insects as Jewelry
Chipped Pearls
"Pinked" Pearl
Synthetic Star Ruby
Tanzanite with Iridescent Coating
To view the full section, download the PDF above.