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Spiral structure in a Colombian emerald
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Batavian tears
Publication

Batavian tears: a gemmological look at glass under extreme tension

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Remarkable capillary inclusions in a yellow synthetic diamond (green emitter) grown using HPHT method.
Micrographs

Remarkable capillary inclusions in a yellow synthetic diamond (green emitter) grown using HPHT method.

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Vesuvianite
Publication

Discover a newly documented vesuvianite deposit

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machine
Insight

Mass vs weight in gemmology: why “1 carat” is a mass

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Synthetic diamonds certification
Insight

Synthetic diamonds certification at GGTL Labratories Switzerland

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A non-copper-bearing elbaite tourmaline
Publication

Throwback to a remarkable non-copper-bearing elbaite tourmaline

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Synthetic rhodochrosite.
Micrographs

Synthetic rhodochrosite

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a tungsten carbide mortars
Insight

Introducing Tungsten carbide mortars

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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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