Research Article Search Results
Dyed Non-Nacreous Pearls
First Identification of Sudoite in Caribbean Ceramic-Age Lapidary Craftsmanship
Extensive analysis of early beads and pendants from archaeological sites in the French islands of the Lesser Antilles identified the objects as sudoite, which has never before been documented in any lapidary production.
Internal Structures of Known Pinctada maxima Pearls: Cultured Pearls from Operated Marine Mollusks
A selection of 74 non-bead cultured and 12 bead cultured pearls grown in cultured pearl sacs and harvested directly from operated mollusks were collected and their internal structures examined using real-time microradiography and X-ray computed microtomography analyses.
Yellow Fluid Inclusions in Transparent Sodalite
A rare transparent and near-colorless sodalite contains two-phase inclusions linking it to its ancient formation.
Rare Mixed Type IaB-IIb Diamond with a Long-Lasting Phosphorescence
Phosphorescent-based screening initially results in a rare mixed-type natural diamond falsely testing as laboratory-grown.
Transparent Rhodonite with Clarity Enhancement
A clarity-enhanced rhodonite stuns with its exceptional size, transparency, and vivid color.
Melo Pearl Found in a Melo Shell
A beautiful melo pearl is accidentally served up for lunch within its host gastropod.
Iridescent Abalone Shell
The optical phenomenon of iridescence creates a beautiful pearly rainbow effect in an abalone shell.
Effects of Blue Fluorescence on Diamond Appearance, Color Treatment and Brightening of “Edison” Pearls, and a Pioneering Gemstone Market in Pakistan
Neptunite Inclusion in Benitoite
CVD Laboratory-Grown Diamond with Counterfeit GIA Inscription
A CVD laboratory-grown diamond with a fraudulent GIA inscription is submitted to the Antwerp lab.
Pearl Classification: The GIA 7 Pearl Value Factors
Provides a visual guide to GIA’s approach to classifying and describing pearls.
