Lab Notes Gems & Gemology, Winter 1989, Volume 25, No. 4

Winter 1989 G&G Lab Notes

Plastic Imitation Amber
Diamond with an Almandine-Pyrope Garnet Inclusion
Bicolored Diamond
Diamond with a Color-Change Garnet Inclusion
Radium Treated Diamond
Treated Diamond Crystal
Impregnated Jadeite Jade
Assembled Pearl
Treated Black Cultured Pearl
Damaged "Burma" Ruby
Large Purple Scapolite
Blue Tourmaline from Brazil
Imitation Cubic Zirconia
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