Lab Notes Gems & Gemology, Summer 1997, Volume 33, No. 2

Summer 1997 G&G Lab Notes

Etched Chalcedony
Diamond with “Additional” Color
Rough Diamond with Contrasting Colors
Treated-Color Yellow Diamonds with Green Graining
An Unusual Assembled Imitation Emerald
Star Feldspar
Jadeite Jade Beads of an Unusual Color
Jadeite Cavity Impregnated with a Colored Filler
Dyed Impregnated Jadeite Bangle without a “Dye Band” Spectrum
Assembled Imitation Ruby
Sapphire with Evidence of Heat Treatment
Serendibite, a Rare Gemstone
Zircon with “Play-of-Color”
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