Lab Notes Gems & Gemology, Summer 1991, Volume 27, No. 2

Summer 1991 G&G Lab Notes

Amber Damaged in Cleaning
Large Electron-Treated Diamond
Electron Treated Diamond in Period Jewelry
Fracture Filled Diamond
Green Surface-Colored Rough Diamond Fashioned to a Fancy Light Yellow
Green Diamond with Radiation Stains in Etch Channels
Pearl Cultured "Demi-Pearl"
Freshwater "Rosebud" Pearls
Rare Assembled Cultured Blister Pearls
An Early (?) Flux-Grown Synthetic Ruby
Spinel with Unusual Green Fluorescence
Cobalt-Colored Synthetic Spinel with Unusual Inclusions
Dark Blue Topaz Damaged by Treatment
Radioactive Zircon
To view the full section, download the PDF above.

You are being redirected to GIA Alumni Association, LLC.