sedimentary
Leopard Skin Jasper
Silicon Dioxide (SiO2) with various inclusions
Hardness: 6.5-7 on the Mohs scale; Color: Multi-colored with spotted patterns of orange, tan, and brown; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on the Mohs scale; Color: Multi-colored with spotted patterns of orange, tan, and brown; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the infiltration of silica-rich fluids into volcanic ash or sedimentary rocks over millions of years, often associated with the silicification of volcanic ash during the Proterozoic or Paleozoic eras.
Uses & applications
Primarily used for lapidary work, jewelry (cabochons and beads), ornamental carvings, and as a popular metaphysical or collector's stone.
Geological facts
The 'spots' that give it the leopard-like appearance are actually orbicular inclusions of various minerals like iron or manganese; it is a variety of orbicular jasper specifically valued for its distinct animal-print patterns.
Field identification & locations
Identify in the field by its hardness (cannot be scratched by a steel knife), smooth waxy feel when tumbled, and characteristic spotted or 'orbicular' pattern. It is commonly sourced from Mexico, Brazil, and parts of Africa.
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