A ring made entirely of natural diamond was recently submitted to GIA’s New York laboratory.

Diamond formed at incredible depth shows evidence of radioactive fluids in cavities surrounded by green fluorescence halos.

The Hong Kong laboratory recently examined a Burmese star ruby incorporating a significant amount of bismuth glass.

A freely moving diamond crystal completely enclosed in a diamond from Siberia gets its name from the famous Russian nesting dolls.

A nondestructive rapid screening technique uses fluorescence spectroscopy to identify treated colored pearls.