News

Spiral structure in a Colombian emerald
Synthetic diamonds bag
Insight

Lab-grown or synthetic diamonds: what does the law say?

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Properties and Colouration of Orange Hackmanite from Afghanistan
Publication

Properties and Colouration of Orange Hackmanite from Afghanistan

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“petrified” freshwater crab (Potamos potamois, Olivier, 1804).⁠ ⁠
Publication

“petrified” freshwater crab

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Three-phase digitated inclusion in an emerald from Malipo, China
Micrographs

Three-phase digitated inclusion in an emerald from Malipo, China

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Madagascar’s tree
Insight

Gemstones and Human Adventure: A Journey Through Madagascar’s Mines

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Zircon dramatically altered by high-temperature treatment
Micrographs

Zircon dramatically altered by high-temperature treatment

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dioptase
Insight

Dioptase: a deceptive green with emerald-like reflections

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Hydrogen-rich diamonds
Micrographs

Hydrogen-rich diamonds: rare crystals with star-like zoning

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Fin recouvrement de quartz synthétique incolore sur une plaque de quartz synthétique
Micrographs

Fine overgrowth of colourless synthetic quartz on a plate of synthetic quartz

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Sainte-Marie-aux-Mines 2025
Insight

Sainte-Marie-aux-Mines 2025: 60 Years of Passion for Minerals and Gems

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Negative quartz crystals in colourless quartz
Micrographs

Negative quartz crystals in colourless quartz

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Cartier at the V&A
Insight

A Visit to Cartier at the V&A: When Gemmologists Go to the Museum

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