Leopard Skin Jasper

Physical Properties

Hardness: 6.5–7 Mohs; Color: Tan, cream, or pink background with distinct black, brown, or green circular spots; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None/Conchoidal fracture; Specific gravity: 2.58–2.91.

Formation & Geological History

Formed from volcanic activity (rhyolite) where silica-rich fluids filled cavities or replaced porous material, creating orbicular (circular) patterns. Despite being called jasper, it is geologically an orbicular rhyolite found in ancient volcanic flows.

Uses & Applications

Primarily used for lapidary work, jewelry (beads, cabochons), ornate carvings, tumbled stones for collectors, and in metaphysical practices.

Geological Facts

Also known as Jaguar Stone, it is actually a type of volcanic rock (rhyolite) that has been masquerading as a jasper for years in the gemstone market because of its high silica content and ability to take a smooth polish.

Field Identification & Locations

Identify by its unique 'leopard' spots that appear as rings or solid circles on a lighter matrix. It is most commonly found in Mexico. Collectors look for high contrast between the background and the spots.

Identified on: 4/22/2026

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