mineral
Bloodstone
Chalcedony variety Heliotrope (SiO2 with inclusions)
Hardness of 6.5 to 7 on the Mohs scale, dark green color with distinct red or brown spots caused by iron oxide inclusions, waxy to vitreous luster, microcrystalline crystal structure, and conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, dark green color with distinct red or brown spots caused by iron oxide inclusions, waxy to vitreous luster, microcrystalline crystal structure, and conchoidal fracture with no true cleavage.
Formation & geological history
Forms in hydrothermal veins and cavity fillings in low-temperature silica-rich groundwater environments, often occurring within basaltic traps or sedimentary deposits.
Uses & applications
Used primarily in jewelry, cabochons, carvings, and as a decorative collector's stone.
Geological facts
Historically known as the martyr's stone, ancient legends suggested the red spots were formed from the blood of Jesus Christ falling on green jasper at the crucifixion.
Field identification & locations
Easily identified by its opaque dark green base and striking red blood-like spots. Commonly found in India, Brazil, Australia, and the United States.
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