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Garnet Crystal Inclusion Photomicrograph
Colour-Change Garnet in Diamond

This diamond contained an inclusion of pyrope-spessartine garnet that appeared greyish green in fluorescent light and purplish red in incandescent light.

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Prasiolite with Brazil-law twinning in optic-axis direction
Prasiolite with Inclusion Influenced by Brazil-Law Twinning

A prasiolite specimen displaying Brazil-law twinning, usually seen in the amethyst variety of quartz, is examined.

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IMG - WN13 GNI 157772 300x169
Composite amber with an unusual structure

This 9.12 gram amber composite featured a combination of natural and imitation amber, accompanied by natural and artificial insect inclusions.

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IMG - WN13 GNI 157776 300x169
Scheelite and hübnerite inclusions in quartz from China

A quartz specimen collected from China's Hunan province contained inclusions of scheelite and hübnerite.

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IMG - WN13 GNI 157771 300x169
Bright yellow diamonds from Sierra Leone

Examination of strongly yellow diamonds from the Zimmi area of Sierra Leone revealed graphitised feather inclusions.

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IMG-SU05-GNI 43880 300x169
Bismuthinite inclusions in rose quartz from Madagascar

Inclusions visible to the naked eye are common in almost all varieties of quartz apart from rose quartz.

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IMG-FA08-GNI 76771 300x169
An Interesting Rose Quartz from Madagascar

A new find of rose quartz from Madagascar contained some unusual inclusions.

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IMG-FA13-GNI 154376 300x169
Unusual Epigenetic Malachite Discs in Quartz

The uncommon occurrence of epigenetic malachite, as found in this quartz, can result in vivid green colour.

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Zoned scapolite from India

This contributor encountered parcels of rough and faceted scapolite that appeared strongly zoned to the unaided eye.

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Unusual Dumbbell-Like Inclusion in Diamond

Examination of a 0.40 ct near-colourless round brilliant diamond with a large inclusion resembling a dumbbell

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