sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5-7, opaque reddish-brown color due to iron inclusions, vitreous to dull luster, and conchoidal fracture with no cleavage.
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Physical properties
Mohs hardness of 6.5-7, opaque reddish-brown color due to iron inclusions, vitreous to dull luster, and conchoidal fracture with no cleavage.
Formation & geological history
Forms via the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins, often associated with ancient marine deposits.
Uses & applications
Widely used for lapidary work, cabochons, ornamental carvings, and as a popular specimen for mineral collectors.
Geological facts
Jasper has been used since ancient times for amulets, seals, and tools, and is frequently mentioned in historical lapidary texts.
Field identification & locations
Identify by its distinct red color, waxy-to-dull luster, and characteristic conchoidal breaking pattern. Found worldwide in regions with past volcanic or hydrothermal activity.
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