Twin-crystal of chrysoberyl
Dumortierite in rock crystal, Brazil, polarised light
Stress fissure («sun spangle») in baltic amber
Two-phase inclusion in amethyst, Brazil
Two-phase inclusions in tourmaline from Namibia
Inclusions of hematite in aquamarine, Tanzania
Two-Phase inclusions and rutile needles in rock crystal from Brazil
«Red fox agate» from Patagonia, Argentina

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