sedimentary
Leopard Skin Jasper
Silicon Dioxide (SiO2) with impurities
Hardness: 6.5-7 Mohs; Color: Tan, cream, pink, or red with orbicular leopard-like spots; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline/cryptocrystalline quartz); Specific gravity: 2.58-2.91
- Hardness
- 6
- Color
- Tan, cream, pink, or red with orbicular leopard-like spots
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Tan, cream, pink, or red with orbicular leopard-like spots; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline/cryptocrystalline quartz); Specific gravity: 2.58-2.91
Formation & geological history
Formed through the deposition of silica from volcanic ash or mineral-rich water into voids or sedimentary layers, often associated with volcanic environments.
Uses & applications
Primarily used for lapidary work, jewelry (cabochons, beads), decorative carvings, and as a popular specimen for crystal healing and mineral collectors.
Geological facts
Despite being called Jasper, it is often technically an orbicular rhyolite. The distinct 'leopard' spots are caused by inclusions of different minerals and varying rates of cooling or precipitation.
Field identification & locations
Identify by its characteristic spotted or 'orbicular' pattern and high hardness. It is most famously sourced from Mexico (Chihuahua region) and can be distinguished from other jaspers by its specific color palette of earth tones and circles.
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