Natural etching structure on a crystal face of diamond (trigons), polarised light
Fluid inclusions in quartz with bituminous daughter minerals, China
Two-phase inclusion in amethyst, Brazil
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Two-Phase inclusions and rutile needles in rock crystal from Brazil
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Structure in a healing fissure in topaz from Brazil

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