sedimentary
Picture Jasper
Silicon dioxide with iron oxide impurities (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5-7, waxy to vitreous luster, opaque, exhibits intricate dendritic banding resembling landscapes in earthy brown, tan, and red tones.
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Physical properties
Mohs hardness of 6.5-7, waxy to vitreous luster, opaque, exhibits intricate dendritic banding resembling landscapes in earthy brown, tan, and red tones.
Formation & geological history
Formed from ancient mud and silt rich in silica that solidified and underwent hydrothermal fluid infiltration over millions of years.
Uses & applications
Widely used in lapidary arts, cabochons, ornamental carvings, and jewelry making.
Geological facts
The distinctive scenery-like patterns are created by trapped mineral solutions flowing through fractures in the rock during diagenesis.
Field identification & locations
Identify by its dense microcrystalline quartz structure and striking natural landscape patterns; commonly sourced from Oregon and Africa.
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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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