sedimentary
Leopard Skin Jasper
Silicon Dioxide (SiO2) with impurities
Hardness: 6.5-7 (Mohs scale), Color: tan or pink background with black, brown, or gold orbicular spots, Lustre: Vitreous to waxy, Crystal Structure: Trigonal (Microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: tan or pink background with black, brown, or gold orbicular spots, Lustre: Vitreous to waxy, Crystal Structure: Trigonal (Microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the deposition of silica-rich fluids in the cavities of volcanic rocks or sedimentary environments. The characteristic orbicular patterns are caused by the diffusion of localized impurities during the crystallization and solidification process.
Uses & applications
Predominantly used as a semi-precious gemstone for jewelry, cabochons, beads, and decorative carvings. It is also a popular specimen for rock collectors and practitioners of crystal healing.
Geological facts
Despite being called a 'Jasper', many geological analyses suggest it is actually a form of silicified Rhyolite (an igneous rock) that has undergone extensive alteration. It is often associated with South American folklore related to the jaguar.
Field identification & locations
Identify it by its distinct 'leopard print' spots (orbicular patterns) and its high hardness which resists scratching with steel. It is most commonly sourced from Mexico (specifically the state of Chihuahua), Brazil, and Africa.
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