Rock Identifier
Painted River Rock (Polished fluvial clast with acrylic/synthetic pigment coating) — Sedimentary or Metamorphic (base substrate)
Sedimentary or Metamorphic (base substrate)

Painted River Rock

Polished fluvial clast with acrylic/synthetic pigment coating

Hardness: 6.5-7 (if quartzite/basalt substrate); Color: Natural dark grey/black base covered with gold, green, and black paint; Luster: Glossy (due to paint/sealant); Structure: Massive, water-worn rounded shape.

Hardness
6
Luster
Glossy (due to paint/sealant)
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Physical properties

Hardness: 6.5-7 (if quartzite/basalt substrate); Color: Natural dark grey/black base covered with gold, green, and black paint; Luster: Glossy (due to paint/sealant); Structure: Massive, water-worn rounded shape.

Formation & geological history

The base is a stone typically formed through sedimentary deposition or volcanic activity, subsequently rounded by river or glacial erosion. The surface art is a modern human modification using synthetic paints.

Uses & applications

Decorative art piece, paperweight, garden ornament, or 'kindness rock' for community sharing.

Geological facts

Painted rocks are part of a global movement where people hide art in public spaces for others to find. The substrate is likely a river cobble, which can take thousands of years to naturally round through attrition.

Field identification & locations

Identify by the presence of non-geological pigments and brushstrokes on a naturally rounded stone. Common in craft stores and parks.

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