sedimentary

Painted Pet Rock (Quartzite/Sandstone base)

Silicon Dioxide (SiO2) with anthropomorphic acrylic embellishments

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: Tan/Beige with black and pink ink; Luster: Dull/Earthy; Texture: Smooth, water-worn/rounded clastic texture.

Hardness: 6-7 (Mohs scale)
Color: Tan/Beige with black and pink ink
Luster: Dull/Earthy

Identified March 20, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Tan/Beige with black and pink ink; Luster: Dull/Earthy; Texture: Smooth, water-worn/rounded clastic texture.

Formation & geological history

Formed through the accumulation of sand grains in high-energy aquatic environments (rivers or beaches), followed by lithification. This specific specimen has undergone secondary human-induced artistic modification.

Uses & applications

Primarily used as a decorative novelty item, paperweight, or childhood craft project.

Geological facts

The 'Pet Rock' was a marketing craze in the mid-1970s created by Gary Dahl; this specimen continues that tradition of personifying geological materials.

Field identification & locations

Identify in the field by its distinct smiley face and unusual facial features not typically found in nature. Found commonly in suburban households and craft bins.