mineral
Bloodstone
Chalcedony quartz variety (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale. Dark green with distinctive red or brown spots of iron oxide or jasper.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale. Dark green with distinctive red or brown spots of iron oxide or jasper.
Formation & geological history
Forms in hydrothermal veins and cavity fillings of sedimentary rocks at low temperatures.
Uses & applications
Used widely in ornamental carvings, signet rings, and as a polished gemstone.
Geological facts
Historically known as the martyr's stone, ancient legends claim the red spots were formed from the blood of Christ.
Field identification & locations
Identified easily by its opaque dark green matrix flecked with red spots; found globally in India, Brazil, and Australia.
