sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque red to reddish-brown color, and a vitreous to dull luster with a microgranular crystal structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque red to reddish-brown color, and a vitreous to dull luster with a microgranular crystal structure.
Formation & geological history
Forms from the silica-rich precipitation in marine environments or hydrothermal solutions, often consolidated within sedimentary rock layers over millions of years.
Uses & applications
Commonly used for tumbled stones, cabochons in jewelry, ornamental carvings, and collectible mineral displays.
Geological facts
Red jasper has been used since ancient times for talismans and seals, prized by ancient civilizations like the Egyptians and Greeks.
Field identification & locations
Identify by its rich red color, high hardness that scratches glass, and completely opaque microcrystalline texture. Found globally in regions with ancient marine or volcanic activity.
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