sedimentary
Picture Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, waxy luster, opaque, exhibits intricate brown and tan banding resembling landscapes.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, waxy luster, opaque, exhibits intricate brown and tan banding resembling landscapes.
Formation & geological history
Formed from silica-rich mud or volcanic ash deposited in layers and consolidated over millions of years in arid ancient basins.
Uses & applications
Primarily used for cabochons, jewelry, decorative carvings, and as a popular specimen for collectors.
Geological facts
The unique landscape patterns are created by hydrothermal water flow depositing mineral oxides through permeable sediment layers.
Field identification & locations
Easily identified by its distinct multi-toned earthy banding; commonly found in the western United States, particularly Oregon.
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Sedimentary limestone with invertebrate fossil imprint
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Sandstone or Siltstone
Arenite (if sandstone)
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Sandstone
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Shale
Shale (clastic sedimentary rock)
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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