Magnetite Inclusions in Star Peridot
Magnetite inclusions in a four-rayed star peridot help to date its terrestrial age.
Novelty Cut Diamond with Remarkable “Fire and Ice” Fluorescence
Dramatic color-fluorescing areas in a sword-shaped diamond give rise to the nickname “Fire and Ice.”
15.53 ct Pearl Discovered in Edible Oyster from the Ostreidae Family
A large natural pearl discovered in an edible oyster offers insight to the scientific pearl community.
Synthetic Moissanite with Fraudulent GIA Inscription
GIA Johannesburg identifies fraudulent GIA inscriptions on several synthetic moissanites submitted as diamonds.
Color-Change Cat’s-Eye Diaspore
A 60.71 ct cabochon was recently submitted to the Tokyo lab for identification.
Dramatic Color Zoning in Alexandrite
A gem cutter’s thoughtful design enhances the natural color zoning in an 8.55 ct alexandrite.
Blue Spodumene
Raman analysis helps to confirm the identification of a rare and lovely large blue spodumene.
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