Category: Featured Articles

Cuprian Tourmaline

Cuprian tourmaline is the variety of copper bearing tourmaline mined from locations other than the original source of copper bearing tourmaline in Paraiba, Brazil. The GemGuide considers Paraiba to be an origin-specific trade name…

Andesine Feldspar

Transparent red andesine appeared in the market in 2002. At first, only small quantities were observed. Dealers stated that the apparently new, rare, stone was coming from a small deposit in the Congo. The GMN…

Gem Rough Scams

This seems logical enough since most finished rubies and sapphires are less than one carat in size. But that little fact does not stop the ethically challenged from singing the praises of gem quality corundum…

Gem Money Scheme Exposed

In a story we first reported in the May 2006 GMN (Fraud in the Gem and Jewelry Industry), an investigation was pending on a California company. When we first broke the story, AMX Global Funding…