mineral
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with inclusions of Iron Oxide/Chlorite
Hardness: 6.5-7 (Mohs); Color: Dark green with red speckles; Luster: Vitreous to waxy; Crystal structure: Hexagonal (trigonal cryptocrystalline); Cleavage: None; SG: 2.6-2.7
- Hardness
- 6
- Color
- Dark green with red speckles
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Dark green with red speckles; Luster: Vitreous to waxy; Crystal structure: Hexagonal (trigonal cryptocrystalline); Cleavage: None; SG: 2.6-2.7
Formation & geological history
Formed at low temperatures from silica-rich groundwater percolating through fractures in rocks, where iron oxides or chlorite minerals provide the coloring. Found in volcanic and sedimentary environments.
Uses & applications
Primarily used for lapidary work, jewelry making (cabochons, beads), and as a traditional birthstone for March. Highly valued in crystal healing and metaphysical collecting.
Geological facts
In the Middle Ages, the red spots were believed to be the blood of Christ. It was historically called 'Heliotrope' from the Greek for 'Sun-Turner', as it was believed to change the sun's reflection when placed in water.
Field identification & locations
Identified by its dark green, opaque jasper-like body with distinct red to reddish-brown flecks. Typically found in India, Brazil, Australia, and parts of the United States.
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Mineral
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