mineral
Leopard Skin Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Hardness: 6.5-7 on Mohs scale; Color: reddish-brown matrix with cream, pink, or light brown orbicular markings; Luster: vitreous to waxy when polished; Crystal Structure: Trigonal microcrystalline quartz; Specific Gravity: ~2.65
- Hardness
- 6
- Luster
- vitreous to waxy when polished
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: reddish-brown matrix with cream, pink, or light brown orbicular markings; Luster: vitreous to waxy when polished; Crystal Structure: Trigonal microcrystalline quartz; Specific Gravity: ~2.65
Formation & geological history
Formed through hydrothermal precipitation of microcrystalline silica along with iron oxide minerals, resulting in orbicular patterns. Typically found in volcanic tuff and weathered volcanic host rocks.
Uses & applications
Popular as a lapidary material, used for cabochons, tumbled stones, jewelry beads, and ornamental decorative carvings.
Geological facts
Leopard Skin Jasper is a popular trade name for a form of orbicular jasper that features distinct leopard-like spots. It is actually a form of silicified volcanic ash or rhyolite.
Field identification & locations
Identified by its characteristic spotted or orbicular pattern set within a reddish-brown or tannish jasper matrix. Commonly found in Mexico, Peru, South Africa, and Brazil.
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