Dumortierite in rock crystal, Brazil, polarised light
Twin-crystal of chrysoberyl
Inclusions of hematite in feldspar (sunstone), India
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Inclusions of hematite in aquamarine, Tanzania
Two-phase inclusion in amethyst, Brazil
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Dendrites in agate

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