Checkered Pattern on Diamond
Assembled Bead Cultured Half-Pearl
Investigation in the Carlsbad laboratory reveals a pearl submission is not mabe as initially believed.
Wearable Art Jewelry Supporting Families in Guatemala
New Nigerian Green Beryl Find
New Deposit of Pezzottaite from Madagascar
A highly saturated purplish pink to red pezzottaite from a new deposit in Madagascar is encountered in Tucson and tested by GIA researchers.
“Enhydro” Amethyst from Morocco
Eighth Annual Gianmaria Buccellati Foundation Award Winner
“Bubble Obsidian” from Armenia
Heated Corundum, the Remarkable Winston Red, and an Extraordinary Renaissance Jewel
Spiral Patterns on a Non-Nacreous Pearl
Large “Rainbow Calcite”
Green Jadeite-Omphacite from Guatemala
Gems Keep Giving
Gem-Quality Spinel from Southern Malawi
Natural Non-Nacreous Pearls from Various Marine Mollusks
The Bangkok laboratory studies 35 loose non-nacreous pearls from a wide range of marine mollusk species.
Phenomenal Gems
A look at the most popular phenomenal gems exhibited at the 2025 Tucson gem shows.
Update on Montana’s Rock Creek Sapphire
Rare Faceted Väyrynenite
Uniquely saturated examples of the collector stone were on display at GJX.
Paraíba Tourmaline Melee: An Entry-Level Market Perspective
Black Opal with Unique Play-of-Color
A black opal cabochon set in a ring displays vivid orange play-of-color.
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