Twin-crystal of chrysoberyl
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
Natural etching structure on a crystal face of diamond (trigons), polarised light
Two-phase inclusions in sapphire, Sri Lanka
Two-phase inclusion in amethyst, Brazil
Dendrites in agate
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

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