Green Jadeite-Omphacite from Guatemala
Large “Rainbow Calcite”
New Deposit of Pezzottaite from Madagascar
A highly saturated purplish pink to red pezzottaite from a new deposit in Madagascar is encountered in Tucson and tested by GIA researchers.
New Fluorite Deposit in Nigeria
New Nigerian Green Beryl Find
Zircon Cluster in Ethiopian Sapphire
The presence of these zircon clusters might help separate Ethiopian sapphire from other basalt-related sources.
William Ruser: The Jeweler Who Charmed Hollywood
Large CVD-Grown Diamond Resubmitted after HPHT Treatment
Electroformed Gold Bracelet
Examination of gold bracelet bearing a 14K hallmark reveals a wax or resin material under gold plating.
Exceptionally Rare Titanoholtite
Iridescent Imitation Pearl
Pink and Red Epidote in Quartz
Quarterly Crystal: Diamond in Diamond
Examination of a South African diamond reveals an eye-visible diamond inclusion.
A New Gem Material from Greenland: Iridescent Orthoamphibole
A Gem-Quality Iridescent Orthoamphibole from Wyoming
Update on Ammolite Production from Southern Alberta, Canada
Ammolite: Iridescent Fossilized Ammonite from Southern Alberta, Canada
Synthetic or Imitation? An Investigation of the Products of Kyocera Corporation That Show Play-Of-Color
Jadeite Bangle with the Appearance of Polymer Treatment
Heliodor and Aquamarine with Surface Etching
Hexagonal etch features are observed on the prismatic faces of heliodor and aquamarine crystals.
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