mineral
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with Iron Oxide / Chlorite inclusions
Deep forest green color often containing red speckles of hematite. Hardness is 6.5 to 7 on the Mohs scale. Luster is vitreous to waxy. Microcrystalline (cryptocrystalline) structure. Conchoidal fracture with no distinct cleavage.
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Physical properties
Deep forest green color often containing red speckles of hematite. Hardness is 6.5 to 7 on the Mohs scale. Luster is vitreous to waxy. Microcrystalline (cryptocrystalline) structure. Conchoidal fracture with no distinct cleavage.
Formation & geological history
Formed at low temperatures by the deposition of silica-rich solutions in cavities and veins of igneous and sedimentary rocks, acquiring its green hue from chlorite or amphibole inclusion networks.
Uses & applications
Popular for lapidary art, tumbled pocket stones, cabochons, beads, carved seals, and jewelry.
Geological facts
In antiquity, bloodstone was believed to have mystical powers, such as stopping blood flow and neutralizing poisons. During the Middle Ages, the red spots were thought to represent the blood of Jesus Christ.
Field identification & locations
Identified by its rich dark green body color and microcrystalline quartz texture, often with tiny flecks of red hematite. Major sources include India, Brazil, Australia, Madagascar, and the United States.
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