Bloodstone
Quartz var. Heliotrope · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal, massive or cryptocrystalline habit
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2
Formation Process
Hydrothermal or low-temperature sedimentary deposition, forming as a cryptocrystalline variety of quartz containing green chlorite or hornblende and red iron oxide inclusions
About This Crystal
A tumbled, polished dark green stone showing deep forest green body color with subtle opaque areas and characteristic smooth rounded surfaces
Physical Characteristics
Dark green color, white streak, conchoidal fracture, no distinct cleavage, specific gravity of approximately 2.65, brittle tenacity, vitreous to waxy luster when polished
Optical Properties
Singly refractive aggregate, optically uniaxial positive for individual micro-crystals, refractive index around 1.544-1.553, no significant pleochroism
Hardness & Durability
Origin Region
India, Brazil, Australia, USA, and Scotland in hydrothermal veins and sedimentary deposits
Hardness & Durability
Mohs hardness of 6.5 to 7, good durability and toughness, resistant to standard wear and tear, suitable for most types of jewelry
Care & Maintenance
Clean with warm soapy water and a soft cloth, avoid harsh chemical cleaners, store separately to prevent scratching softer stones, generally stable in light
Rarity & Value
Common, widely available as tumbled stones and carvings, with value determined by the vibrancy of the green color and presence of distinct red spots
Special Characteristics
Opaque to translucent microcrystalline quartz structure with mineral inclusions that give it its distinct mottled appearance
Lore & History
Historically known as the martyr's stone due to legends that it formed from the blood of Christ falling on green jasper at the crucifixion; traditionally associated with courage, vitality, and the root or heart chakras