Rock Identifier
Synthetic Resin (Artificial Specimen) (Polyurethane or Polyester Resin) — mineraloid (man-made)
mineraloid (man-made)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Hardness: 2-3 (Mohs scale), Color: tan with white interior, Luster: dull to waxy, Crystal Structure: amorphous (non-crystalline), Cleavage: none (conchoidal fracture)

Identified More mineraloid (man-made)

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Physical properties

Hardness: 2-3 (Mohs scale), Color: tan with white interior, Luster: dull to waxy, Crystal Structure: amorphous (non-crystalline), Cleavage: none (conchoidal fracture)

Formation & geological history

Produced via industrial polymerization processes where liquid resins are cast into molds and cured at room temperature or with heat. This is a modern mass-produced item.

Uses & applications

Used in the manufacture of toys, figurines, decorative collectibles, and household items due to its ability to replicate fine textures and its durability.

Geological facts

This specimen is an imitation. The fracture point on the ear clearly reveals a white, homogeneous interior hidden by a painted exterior, which is characteristic of molded plastic or resin toys rather than natural stone.

Field identification & locations

Field identification involves noting the consistent internal color, lightweight feel compared to stone, and the presence of molding spray-lines or joints. It does not occur naturally in geological environments.