Research Article Search Results

Rubies from Mozambique, which were examined at the Lotus Gemology lab in Bangkok, proved to be infilled with böhmite, a secondary mineral in corundum.

Gem silica, also known as “chrysocolla chalcedony,” is considered the most valuable variety of chalcedony.

Orange crystal inclusion identified as the rare mineral triplite in a beryl from Pakistan.

This year at the AGTA show, the number of booths selling skillfully carved, fantasy cut, or expertly recut items was noticeably higher than in past years.

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

Untreated Russian emeralds, rarely seen in the market, demonstrate a range of color and degree of fineness.

Mina Stones promotes Nigerian gems including rubellite and sapphire as well as reviving traditional skills and symbols in the creation of original jewelry.

Application of slight pressure perpendicular to the twinning planes reveals the unusual property of this synthetic gem.

The unusual six-rayed trapiche pattern, identified mainly with Muzo emeralds, has also been discovered in Mogok sapphires and Mong Hsu rubies.

GIA’s Hong Kong laboratory looks at a new radio-frequency identification (RFID) technology for tracking cultured pearls.