Lab NotesGems & 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 Might Also Like

YMAL AJP
Discover GIA's New Campus in London
Learn About NextGem
GIA NextGem™ Diamond Training for Retail
Explore GIA Laboratory Promotional Offers
Explore GIA Laboratory Promotional Offers
Shop the GIA Store
Shop the GIA Store