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A complex skeletal smokey quartz from Brazil.
Smooth stone with concentric rings and layered mineral buildup.
An etched aquamarine crystal from Ireland.
Rhodochrosite specimen from Kalahari Manganese Fields, South Africa.
various minerals in the form of small multicolored pebbles processed to smoothness
Azurite specimen from Tsumeb mine, Namibia.
Dioptase with malachite pseudomorph after azurite from Katanga, Congo.

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