Michael Dyber’s Innovative Gem Carving
Michael Dyber discusses his approach to gem carving.
Unusual Pink Sapphire Bead
New Tourmaline Pockets in San Diego County’s Pala District
Faceting Large Gemstones
A Pearl Identification Challenge
Two pearls presented a unique challenge, as testing at three different gemological laboratories could not conclusively identify them as natural or cultured, determine a freshwater or saltwater growth environment, or specify the producing mollusk.
Unusual Glass-and-Quartz Triplet Imitation of Emerald
Identifying Gem-Quality Synthetic Diamonds: An Update
Inclusions in Natural, Treated, Synthetic, and Imitation Opal
Provides a visual guide to the internal features of natural, treated, synthetic, and imitation opal.
Rare Gadolinite Gemstone
New Emerald Production from the Curlew Mine, Western Australia
Star Aquamarine
The Identification of Blue Diffusion-Treated Sapphires
Blue diffusion-treated sapphires are becoming more prevalent than ever before.