News

Spiral structure in a Colombian emerald
Cobaltocalcite or cobaltoan calcite
Research

Cobaltocalcite or cobaltoan calcite: A Swiss answer

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Pyrochlore automorphous crystal and comet tail in a blue sapphire-NTE
Micrographs

Pyrochlore automorphous crystal and comet tail in a sapphire (NTE)

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Cavity filling (C2) - Mong Hsu-Myanmar
Micrographs

Cavity filling (C2) in a ruby from Mong Hsu, Myanmar

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Bubbles in epoxy resin, emerald from Chivor, Colombia (darkfield illumination)
Micrographs

Bubbles in epoxy resin in an emerald from Chivor, Colombia (darkfield illumination)

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Garnet inclusion in type Ia diamond (darkfield illumination)
Micrographs

Garnet inclusion in type Ia diamond (darkfield illumination)

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Elongated biotite crystal inclusion with interface light interference in an aquamarine from Madagascar
Micrographs

Elongated biotite crystal inclusion with interface light interference in an aquamarine from Madagascar

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Flame pattern in a non-nacreous natural pearl from an unknown mollusc
Micrographs

Flame pattern in a non-nacreous natural pearl from an unknown mollusc

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Blue residues and gas in bubbles in synthetic sapphire
Micrographs

Blue residues and gas in bubbles in green synthetic quench-cracked flame fusion sapphire

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Ruby from Cambodia
Micrographs

Ruby from Cambodia (TE2): Light interference in a thin fracture containing artificial glassy material

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GemAlliance welcomes its 5th member: the LFG
Insight

GemAlliance welcomes its 5th member: the LFG

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“Boehmite Needles” in Corundum Are Rose Channels
Micrographs, Research

“Boehmite Needles” in Corundum Are Rose Channels

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GemAlliance welcomes its 4th member: the JGGL
Insight

GemAlliance welcomes its 4th member: the JGGL

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