Prasiolite with Inclusion Influenced by Brazil-Law Twinning
A prasiolite specimen displaying Brazil-law twinning, usually seen in the amethyst variety of quartz, is examined.
Pyrex Bracelets
Dyed Bone as a Red Coral Imitation
A specimen presenting as red coral is revealed to be dyed bone.
Shattuckite from the DRC
Rare shattuckite from the Democratic Republic of Congo, as seen at the Tucson Gem and Mineral Show.
Assemblage of Synthetic Ruby in Calcite Matrix
Material set in a calcite matrix and represented as natural ruby is proven to be synthetic.
Chameleon Diamond with Nickel Absorption Band
GIA Museum Exhibits in New York
A brief look at GIA's permanent museum exhibit at the New York lab and campus.
Using Conventional Equipment to Separate Natural from Synthetic Ametrine
A summary of the article “A simple approach to separate natural from synthetic ametrine,” by Francine Payette.
Jewelry Shanghai 2014
An insider look at the May 2014 show, held at the Shanghai Word Expo Exhibition & Convention Center.