Bloodstone
Quartz var. Heliotrope · Semi-Precious Gemstone
Crystal System
Trigonal, microcrystalline (Chalcedony variety), massive habit
Mineral Group
Silicates
Chemical Formula
SiO2 with inclusions of iron oxides and amphiboles
Formation Process
Hydrothermal and sedimentary deposition in low-temperature silica-rich groundwater
About This Crystal
A tumbled, opaque dark green chalcedony stone featuring distinctive reddish-brown to yellowish iron oxide inclusions and bands resembling droplets of blood
Physical Characteristics
Dark green body color with red/yellow spots, white streak, uneven to conchoidal fracture, no cleavage, specific gravity around 2.65, brittle tenacity
Optical Properties
Singly refractive (microcrystalline aggregates), aggregate refractive index around 1.53 - 1.54, typically non-pleochroic
Hardness & Durability
Origin Region
India, Brazil, Australia, USA, and Scotland
Hardness & Durability
Mohs hardness of 6.5 to 7, good toughness making it durable for daily jewelry wear
Care & Maintenance
Clean with warm soapy water and a soft brush, avoid harsh chemicals, ultrasonic cleaners, and prolonged exposure to direct sunlight
Rarity & Value
Common to uncommon, value depends on the balance of rich green background and striking red inclusions, typically very affordable
Special Characteristics
Distinctive red blood-like spots or veins distributed throughout an opaque green matrix
Lore & History
Historically known as the stone of courage and nobility, ancient legends claimed it formed from the blood of Christ falling on jasper at the crucifixion, traditionally associated with the root and heart chakras