Where is Jasper found?
Chalcedony (a variety of microcrystalline quartz)
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Open the appJasper occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Jasper
United States
Oregon (Picture Jasper), Idaho (Bruneau Jasper), California (various types), Arizona, Washington.
Australia
Pilbara region (Mookaite Jasper), various other localities.
India
Known for various colors and patterns.
Madagascar
Produces orbicular and other patterned jaspers.
Russia
Ural Mountains (Orsk Jasper).
Egypt
Historically significant source of red jasper.
Collecting tips
- Look for associated geology. Jasper is often found in areas with past volcanic activity, hydrothermal alteration, or in sedimentary layers where silica-rich fluids have permeated.
- Examine riverbeds and gravels. Jasper is durable and often survives weathering and transport, making it a common find in alluvial deposits.
- Check for opaque, fine-grained material. Unlike crystalline quartz, jasper is opaque and lacks visible crystal faces. Its fracture will be smooth and conchoidal.
- Observe color and pattern. The wide range of colors and distinctive patterns are key indicators. Look for reds, yellows, browns, and greens, often with banding, orbicular structures, or brecciated textures.
Quick Check
- Color:
- Opaque, highly variable (red, yellow, brown, green, multi-colored)
- Luster:
- Dull to waxy, sometimes vitreous on fresh fracture
- Streak:
- White
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