Research Article Search Results
Multiphase Fluid Inclusions in Blue Sapphires from the Ilmen Mountains, Southern Urals
Sapphires from Russia’s Ilmen State Reserve may provide insight into gem corundum from secondary placers.
Metallic Chromium Inclusions in Industrial By-Product Ruby
Inclusions in technogenic ruby slag help to separate this material from other specimens, both natural and synthetic.
In Rainier’s Footsteps: Journey to the Chivor Emerald Mine
Chronicles the famed emerald source through the adventures of Peter W. Rainier, who directed the mine from 1926 to 1931 and restored its former glory.
Iridescent Spondylus Pearl
Iridescence is seen in a porcelaneous pearl examined at the Carlsbad laboratory.
HPHT and CVD Diamond Growth Processes: Making Lab-Grown Diamonds
Dr. James E. Shigley describes the means of distinguishing colorless and colored synthetic gem-quality diamonds from natural diamonds.
Montana’s Gem Mountain Sapphire Mine: Sharing the Excitement of Mining with the Public
Join a GIA field team on an expedition to Gem Mountain, Montana, and witness the rarely seen sapphire heat treatment process and tourists passionately searching for treasures to turn into cherished jewelry.
Afghan Emerald, Tajik Ruby, and Clarity-Enhanced Tourmaline
Rare Emerald from China and Pink Sapphire from Sri Lanka
Ruby and Sapphire from Muling, China
An emerging corundum deposit in northeastern China is discussed.
Blue Sapphires From a New Deposit Near Andranondambo, Madagascar
A recent rush in Madagascar yields new sapphire production.
