Gemological and Trace Element Characteristics of Cassiterite from Yunling, China
Examines gem-quality cassiterite from southwest China and analyzes trace element chemistry to distinguish it from Bolivian cassiterite.
Square-Shaped Cloud in Diamond
A natural faceted diamond displays a prominent square-shaped cloud under the table.
Micro-Features of Tourmaline
Provides a visual guide to the internal features of tourmaline as well as tourmaline inclusions in other gem hosts.
Laboratory-Grown Diamonds: An Update on Identification and Products Evaluated at GIA
Reviews the advancements and major trends in laboratory-grown diamonds observed by GIA since 2007.
GIA Student Design Showcase
A GIA student from the New York campus receives recognition for a necklace design featuring diamonds, lavender jade, and akoya pearls.
Seventh Annual Gianmaria Buccellati Foundation Award Winner
A graduate of GIA’s Jewelry Design program in Taiwan is the recipient of the 2023 Gianmaria Buccellati Foundation Award.
The Appeal of Non-Nacreous Pearls
Several vendors offered a variety of impressive non-nacreous pearls at the Tucson gem shows.
CVD with “Ancient Text” Clouds
A CVD-grown diamond exhibits an interesting clarity characteristic.
Trigon Party on a Diamond
Rose Channels in Ruby
Thirty Years Later: “The Royal Tapestry” Revisited
Unique Sphalerite from Spain
Precious Opal from Pedro II, Brazil
Unusual Aquamarine–White Beryl
Ukrainian Pegmatitic Heliodor and Topaz
Gemstones and Art
A visit to the Tucson Fine Mineral Gallery uncovers impressive gemstone-related artwork.
An Exceptional Cat’s-Eye Emerald
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