sedimentary
Leopard Skin Jasper
Jasper (Silicon Dioxide with impurities), SiO2
Hardness: 6.5-7 (Mohs scale); Color: Pinkish-orange, cream, and brown mottled with black orbicular spots; Luster: Vitreous to waxy; Structure: Microcrystalline quartz; Cleavage: None (conchoidal fracture).
- Hardness
- 6
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Pinkish-orange, cream, and brown mottled with black orbicular spots; Luster: Vitreous to waxy; Structure: Microcrystalline quartz; Cleavage: None (conchoidal fracture).
Formation & geological history
Formed from silica-rich precipitates in volcanic or sedimentary environments where minerals like iron and manganese create orbicular patterns during deposition and lithification.
Uses & applications
Used primarily for lapidary work, jewelry (cabs, beads), carved ornaments, and as a popular specimen for rock collectors.
Geological facts
Despite its name, it is technically an orbicular rhiolitic jasper. It is known for its distinctive spots that mimic the coat of a leopard and is one of the most recognizable varieties of jasper.
Field identification & locations
Identify by its opaque base color and nearly circular, irregular black or dark brown spots. Commonly found in Mexico (Chihuahua) and Brazil. Collectors look for high-contrast patterns and lack of surface pitting.
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