Research Article Search Results
Microscopic Shells in Natural Pearls from Pinctada radiata
Two pearls from Bahrain containing minute shells are examined at GIA’s Mumbai laboratory.
Pinctada radiata Atypical Bead Cultured Pearls from the UAE
GIA’s Mumbai laboratory reports on pearl samples from a culturing experiment by the Suwaidi Pearl Farm in the UAE.
Ruby with Interesting Synthetic Overgrowth
Microscopic examination of a ruby at the Carlsbad laboratory reveals synthetic overgrowth indicative of high-temperature heat treatment.
Gemological Characterization of Montana Sapphire from the Secondary Deposits at Rock Creek, Missouri River, and Dry Cottonwood Creek
Examines the mining history and geological characteristics of the three secondary sapphire deposits in the state of Montana, as well as the properties of these sapphires (unheated and heat-treated).
Enormous Cat’s-Eye Aquamarine
A 586.43 ct cat’s-eye aquamarine is donated to the Smithsonian National Museum of Natural History.
Exceptional Gemstone Acquisitions by the Kreis Family
Stefan and Alexander Kreis share three impressive gemstone acquisitions at GJX in Tucson.
Forsterite in a Purple Tanzanian Spinel
Examination of a purple spinel from Tanzania reveals a rare forsterite inclusion.
Luminescent Synthetic Garnet-Like Crystals
Unique rough and faceted luminescent synthetic garnet-like crystals were on display at the 22nd Street show in Tucson.
New Tourmaline Pockets in San Diego County’s Pala District
Bill and Carl Larson share details about new tourmaline pocket discoveries at the Tourmaline King mine.
New Find of Petroleum-Included Quartz from Madagascar
Examination of quartz from a new source in Madagascar reveals complex fluid inclusions consisting of petroleum, methane, asphaltite, and water.
Exceptionally Rare Pearls from ECIJA
An impressive variety of natural, wild, nacreous, and non-nacreous pearls were on display at the GJX show.
