Spinel crystal in dolomite marble, Burma
Agate from Reichweiler, Germany
Partially etched diamond crystal
Inclusions of hematite in feldspar (sunstone), India
Stress fissure («sun spangle») in baltic amber
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Dendrites in agate
«Red fox agate» from Patagonia, Argentina
Empreinte
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