Dendrites in agate
Dumortierite in rock crystal, Brazil, polarised light
Inclusions of gilalite aggregates in rock crystal from Brazil
Inclusions of hematite in aquamarine, Tanzania
Two-phase inclusions in tourmaline from Namibia
Stress fissure («sun spangle») in baltic amber
Two-phase inclusions in sapphire, Sri Lanka
Structure in a healing fissure in topaz from Brazil

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