Rhodium-Plated Iron Meteorites
The annual Tucson Gem and Mineral Show has been a reliable source for the niche and the unusual, as seen with the rhodium-plated iron meteorites acquired by author BL at the 22nd Street Show in February 2020.
Snowflake Inclusions in Mong Hsu Ruby
A holiday snowflake scene in a treated Mong Hsu ruby surprises and delights a gemologist in the Bangkok lab.
Artificial Glass Imitating a Paraíba Tourmaline
A creative imitation using fused bluish green glass with copper platelets poses as Paraíba tourmaline.
Uncommon Inclusion of Lazurite in Ruby from Mogok, Myanmar
A parcel of small rubies was received for identification at the S Gemmological Institute (SGI) gem lab in Yangon, Myanmar.
Pink Sapphires from Madagascar, Rose-Cut Colored Stones from the Baroque Era, Separating Blue Amber Localities, and More…
An overview of the Winter 2020 Gems & Gemology content.
A Study on Improving the Surface Appearance of Low-Quality Pinctada maxima Bead Cultured Pearl
GIA Counters Counterfeit Inscriptions
CARLSBAD, Calif. – Feb. 23, 2021 – Recently, GIA (Gemological Institute of America) encountered a number of stones that were submitted for updated reports or verification services that did not match the GIA report submitted with them. The newly-submitted stones were either laboratory-grown diamonds or treated natural diamonds, falsely inscribed with GIA report numbers.
US$2 Million Available in 2021 GIA Scholarships
CARLSBAD, Calif. – Feb. 3, 2021 – Whether you are new to the gem and jewelry industry or a veteran looking to expand your knowledge, education from GIA will equip you with the tools to succeed. A scholarship from GIA makes achieving your educational goals financially attainable.
Colorless to Near-Colorless Diamonds, Emeralds from Pakistan, a History of European Royal Jewel Sales, and More…
An overview of the Fall 2020 Gems & Gemology content.
Unknown Dendritic Inclusions in Sapphire
Dendritic inclusions in a pinkish-purple sapphire are revealed with fiber-optic lighting.
Quarterly Crystal: Ferrocolumbite in Topaz
“Star cruisers” formed of ferrocolumbite seem to fly in a large topaz crystal from the Shigar Valley in Pakistan.
A History of European Royal Jewel Sales, Including Sotheby’s 2018 Auction of Marie Antoinette’s Jewels
Chronicles important auctions of jewels from European royal collections over the years, with a focus on a recent high-profile sale of items that once belonged to Marie Antoinette.
Inclusion and Trace Element Characteristics of Emeralds from Swat Valley, Pakistan
Presents a detailed study of gemological properties, inclusion features, spectroscopic characteristics, and chemical composition of emeralds from this important source.
Unique Raindrop Pattern of Turquoise from Hubei, China
Presents spectroscopic and chemical analysis of a new variety of turquoise with a rare raindrop pattern with saturated colors.
Natural-Color D-to-Z Diamonds: A Crystal-Clear Perspective
Examines a very large dataset of colorless to near-colorless diamonds submitted to GIA and evaluates their diamond type and spectroscopic properties.
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.
Magnetite Inclusions in Star Peridot
Magnetite inclusions in a four-rayed star peridot help to date its terrestrial age.
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.
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