Multi-Generation Cutting Family from Idar-Oberstein
Alexander Arnoldi explains the strategy of Arnoldi International and provides an update on some new high-quality materials.
DNA Barcoding and Next-Generation Sequencing (NGS) of Freshwater Pearls
Freshwater pearls are the subject of GIA’s latest research involving the DNA barcoding and next-generation sequencing of biogenic materials.
Gems & Gemology at Ninety: Consistency and Change
An overview of the Summer 2024 Gems & Gemology content.
A “Cobalt Blue” Gahnospinel
Cobalt is identified as the primary coloring agent in an intense blue specimen of gahnospinel at GIA’s Bangkok laboratory.
Large Faceted Pallasitic Peridot
A large specimen of extraterrestrial peridot is analyzed at the Carlsbad laboratory.
Preview of Nature Art Science with Paula Crevoshay
Renowned designer Paula Crevoshay discusses artistic influences and her latest creations.
Yellow Mn-rich Tourmaline from the Canary Mining Area, Zambia
The most important source of yellow gem elbaite is the Canary mining area in the Lundazi District of eastern Zambia.
Jewelry Television in Tucson
A look at JTV’s history, current activities, and impact on the industry.
Aegirine in Poudretteite
Aegirine inclusions are observed in two samples of poudretteite from Mogok.
G&G Contributors Awarded for Best Geoscience Research
Several G&G contributors are recognized for their work on the latest volume in the Reviews in Mineralogy & Geochemistry series.
Two Pearls of Indian Cultural Significance
Two pearls representing Indian deities were recently examined in the Mumbai laboratory.
Ancient Script-Like Serpentine in Brown Peridot
Examination of a brown peridot xenocryst reveals thread-like serpentine inclusions resembling ancient text.
Identification of Natural, Reconstructed, and Imitation Root Amber
Three types of root amber beads submitted for identification are analyzed in Wuhan, China.
GIA Mobile Application Privacy Notice
寺院と宝物
カリフォルニア州カールスバッドにあるGIA本部の壮大な新展示「南アジアの寺院と宝物」は、来場者を豊かな寺院の風景に没入させ、そこに展示されている宝石、宝石結晶、ジュエリーは単に魅力的な輝きを放つだけでなく、より高い力への道筋となっています。
The Distinction of Natural from Synthetic Alexandrite by Infrared Spectroscopy
A useful way to identify stones that contain no distinguishing inclusions.
Spray of Columbite Crystals in Topaz
A cluster of bladed columbite crystals is identified in colorless topaz.
Turquoise Planet Earth
A sphere of Armenian turquoise with natural brown matrix material mimics planet Earth.
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