A Near-Round Natural Pearl Discovered in the Edible Oyster Magallana bilineata
An edible oyster from the Hab River Delta of Pakistan reveals a natural pearl.
Euhedral Phantom Sapphire in Sapphire
A phantom sapphire crystal within a host sapphire crystal was recently examined at GIA’s Carlsbad laboratory.
Pyrope-Almandine Garnet in Sapphire Host
The Bangkok laboratory recently identified a pyrope-almandine garnet in a sapphire host.
Evidence of Rotation in Flame-Structure Pearls from Bivalves of the Tridacnidae Family
A study of these pearls to characterize their distinctive flame structure and examine the possibility of rotation during their formation or growth.
Dive Into Summer: Mozambique Ruby, Madagascar Sapphire, and Black Nephrite from China, Plus an Opal Inclusions Chart
Tagua Nut as a Sustainable Botanical Alternative for Ivory
Jewelry designer Alexandra Mor uses sustainable alternatives for elephant ivory.
A Special Type of Trapiche Quartz
Three incomplete trapiche quartz make up this interesting sample.
Gemological and Chemical Characteristics of Natural Freshwater Pearls from the Mississippi River System
Gem Art of the Taj Mahal, Fancy White and Black Diamonds, and Unique Inclusions in Thai Corundum
Black Nephrite Jade from Guangxi, Southern China
Characterizes black nephrite from a deposit in the Guangxi region that appears to be part of a large-scale jade formation belt in southern China.
Purple Fluorite Inclusion in Emerald from Russia
Fluorite inclusions in emeralds from various localities have been reported extensively in the literature.
Rough Diamond Crystal with an Unusual Coating of Fake Green “Radiation Stains”
The interior structures of pearls are always of interest, as they are never revealed until the analysis begins.
Inclusion-Rich Black Topaz from the Thomas Mountains, Utah
Topaz is an important gemstone that occurs in various colors.
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