Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of hematite in feldspar (sunstone), India
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Spinel crystal in dolomite marble, Burma
Midge included in amber from the Baltic coast, polarised light
«Red fox agate» from Patagonia, Argentina
Fluid inclusions in quartz with bituminous daughter minerals, China
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

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