Diamond-Bearing Eclogite Xenoliths from the Ardo So Ver Dykes
Mineralogical examination of diamond-bearing material from South Africa reveals the specimens to be eclogite xenoliths.
Update on Rock Creek Sapphire Deposit
An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.
Summer 1990 Gem News International
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
Large Oolitic Opal Block
The natural-color oolitic opal is the largest of its type examined by GIA.
Indian Ruby Mining
An overview of ruby mining in the southern Indian states of Tamil Nadu and Karnataka.
Natural Pipi Pearls from Tahiti
An overview of natural "pipi" pearls from French Polynesia.