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Laboratory-Grown Diamond with Internal Laser Markings
Dyed Non-Nacreous Pearls
Very Small Akoya Cultured Pearls
A selection of very small akoya cultured specimens demonstrates the challenges gemologists face when determining pearl origin.
In Memoriam: Andrew Cody
Pinctada maxima Pearls from Operated Mollusks, Sudoite in Ceramic-Age Caribbean Jewelry, Persian Turquoise Field Report, and More
Unusual Dark Orangy Red Cordierite
A cordierite with a color not seen in the GIA lab is examined in New York.
Ruby and Sapphire from Muling, China
An emerging corundum deposit in northeastern China is discussed.
Yellow Sapphire: Natural, Heat-Treated, Beryllium-Diffused, and Synthetic
Investigates the various chromophores responsible for color in four types of yellow sapphire.
Blackish Green Omphacite Jade from Guatemala
A Guatemalan jade called yongchuliao has gained popularity among Chinese buyers.
Chicago Responsible Jewelry Conference
A report on the seventh annual Chicago Responsible Jewelry Conference.
