Rock Identifier
Leopard Skin Jasper (Silicon Dioxide (SiO2) with mineral inclusions) — sedimentary
sedimentary

Leopard Skin Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Hardness: 6.5-7 on Mohs scale; Color: Cream, tan, brown, reddish-brown, and green in orbicular or spotted patterns; Luster: Vitreous to waxy when polished; Crystal structure: Trigonal (microcrystalline/cryptocrystalline quartz); Cleavage: None, exhibits conchoidal fracture.

Hardness
6
Luster
Vitreous to waxy when polished
Identified More sedimentary
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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Cream, tan, brown, reddish-brown, and green in orbicular or spotted patterns; Luster: Vitreous to waxy when polished; Crystal structure: Trigonal (microcrystalline/cryptocrystalline quartz); Cleavage: None, exhibits conchoidal fracture.

Formation & geological history

Formed through hydrothermal deposition of silica within volcanic cavities or ash beds, where iron oxides and other mineral impurities aggregate in distinct orbicular or blotched patterns during precipitation.

Uses & applications

Used primarily as decorative lapidary material, in polished cabochons for jewelry, tumbled stones, carvings, and popular among gemstone collectors and metaphysical enthusiasts.

Geological facts

Also known as Leopardite or Orbicular Jasper, its distinctive spotted appearance resembles the coat of a leopard. It is actually a form of orbicular chalcedony mixed with various iron and manganese oxide inclusions.

Field identification & locations

Identified by its distinctive multi-colored blotched or leopard-like spotted markings on an opaque chalcedony base. Commonly found in Mexico, Peru, Brazil, and South Africa. Easily polished for tumbled stone collections.