Bloodstone
Quartz var. Heliotrope · Semi-Precious Gemstone and Decorative Stone
Crystal System
Trigonal, microcrystalline (Chalcedony variety)
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2
Formation Process
Sedimentary or hydrothermal deposition, forming from silica-rich groundwater filling cavities in rocks at low temperatures and pressures.
About This Crystal
A polished, tumbled dark green stone with a smooth, glossy surface and a vitreous to waxy luster. It exhibits deep forest green coloring characteristic of chalcedony with subtle tonal variations.
Physical Characteristics
Dark green body color with a white streak, conchoidal fracture, lack of distinct cleavage, specific gravity around 2.58-2.64, and brittle tenacity.
Optical Properties
Microcrystalline aggregate displaying aggregate double refraction with a refractive index of approximately 1.535-1.539, typically opaque to translucent.
Hardness & Durability
Origin Region
India, Brazil, Australia, USA, and Czech Republic; typically forms in sedimentary rocks or low-temperature hydrothermal veins.
Hardness & Durability
Mohs hardness of 6.5 to 7, making it durable and well-suited for various types of jewelry with good wearability.
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid harsh chemicals, ultrasonic cleaners, and prolonged exposure to direct sunlight to preserve surface polish.
Rarity & Value
Common to uncommon; value is determined by the vividness of the green body color, symmetry of tumbling, and absence of unwanted surface fractures. Usually affordable.
Special Characteristics
While classic bloodstone features distinctive red jasper inclusions (resembling blood spots), this specific polished specimen appears as a solid dark green variety of heliotrope.
Lore & History
Historically known as the 'stone of courage and nobility', ancient warriors used it to stop bleeding and protect in battle. In modern crystal healing, it is associated with the root and heart chakras, vitality, and grounding.