sedimentary
Leopard Skin Jasper or Ring Jasper
Microcrystalline Quartz (Chalcedony with impurities)
Hardness of 6.5 to 7 on the Mohs scale, specific gravity around 2.6 to 2.7, vitreous to dull luster, cryptocrystalline structure with distinct concentric banding or orbicular patterns, conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, specific gravity around 2.6 to 2.7, vitreous to dull luster, cryptocrystalline structure with distinct concentric banding or orbicular patterns, conchoidal fracture.
Formation & geological history
Formed through the deposition of silica-rich fluids in cavities or fractures of pre-existing rocks, often in volcanic or sedimentary environments, undergoing slow precipitation over millions of years.
Uses & applications
Used in lapidary arts, making polished stones, ornamental carvings, cabochons for jewelry, and as a collector's specimen.
Geological facts
Jasper varieties often display unique patterns resembling animal prints or concentric eyes due to alternating layers of mineral impurities like iron oxides and manganese during formation.
Field identification & locations
Easily identified by its distinctive patterned rings or spots on a smooth, weathered river pebble or tumbled surface. Commonly found in riverbeds, glacial tills, and areas with ancient volcanic or sedimentary activity.
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