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
"Demi-Pearl"
"Pinked" Pearl
Synthetic Star Ruby
Tanzanite with Iridescent Coating
 
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