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Spiral structure in a Colombian emerald
GGTL Laboratories Switzerland cherche: Gradeur.euse diamant mêlé
Insight

GGTL Laboratories Switzerland is looking for: Melee diamond grader

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Inclusions de cinabre dans une opale éthiopienne
Research

Cinnabar Inclusions in Ethiopian Opal

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Une coupe ethiopienne en corne de rhinoceros
Research

An Ethiopian cup in rhinoceros horn (1/2)

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Coupe éthiopienne en corne de rhinocéros
Research

An Ethiopian cup in rhinoceros horn (2/2)

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An exceptional 9.89 carats photochromic zircon
Research

An exceptional 9.89 carats photochromic zircon

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A jewel with a large number of flux-grown synthetic rubies
Research

The unusual case of a jewel with a large number of flux-grown synthetic rubies sold as natural rubies

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Synthetic flame-fusion colour-change sapphire seen under laser excitation
Micrographs

Synthetic flame-fusion colour-change sapphire seen under laser excitation

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Amazing synthetic flame-fusion synthetic colour-change sapphire seen under laser excitation
Micrographs

Synthetic flame-fusion synthetic colour-change sapphire seen under laser excitation

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HPHT synthetic yellow diamond, luminescence under strong SWUV irradiation
Micrographs

HPHT synthetic yellow diamond, luminescence under strong SWUV irradiation

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Pyramidal tops of quartz embedded in beige chalcedony
Micrographs

Pyramidal tops of quartz embedded in beige chalcedony

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Happy Birthday, GemAlliance
Insight

Happy Birthday, GemAlliance!

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High-temperature heated blue sapphire from Sri Lanka
Micrographs

High-temperature heated blue sapphire from Sri Lanka

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