Bloodstone
Quartz var. Chalcedony (Bloodstone or Heliotrope) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal (Hexagonal); Cryptocrystalline habit (crystals too small to see with the naked eye)
Mineral Group
Silicates; Tectosilicate (Quartz family)
Chemical Formula
SiO2 (Silicon Dioxide) with inclusions of Fe2O3 (Hematite) or Silicate minerals like Chlorite
Formation Process
Hydrothermal; forms at low temperatures in shallow groundwater environments, filling cavities in volcanic rocks
About This Crystal
An opaque, dark green to brownish-red variety of chalcedony. This specific specimen exhibits a dense, mottled mix of deep red iron oxides and dark jasper-like tones. It has a vitreous to waxy luster and has been polished into an oval cabochon or palm stone.
Physical Characteristics
Color: Deep Jasper-red to dark green; Streak: White; Cleavage: None; Fracture: Conchoidal to splintery; Specific Gravity: 2.58–2.64; Fluorescence: Generally inert.
Optical Properties
Refractive Index: 1.530–1.543; Birefringence: up to 0.004; Pleochroism: none; Optical character: Aggregate (singly refractive in appearance).
Hardness & Durability
Origin Region
India (major source), Brazil, Australia, Madagascar, and the United States (California/Oregon)
Hardness & Durability
Mohs Hardness: 6.5 to 7; Toughness: Very good due to its microcrystalline structure; Stability: Generally stable but sensitive to hydrofluoric acid.
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals and ultrasonic cleaners; store separately from harder gems like sapphires or diamonds to prevent scratches.
Rarity & Value
Common; Value is determined by the distinctness of the patterns and 'blood' spots. Generally affordable, ranging from $5 to $50 for standard polished pieces.
Special Characteristics
Known for its distinctive red speckles (hematite) against a darker background; some specimens show 'mossy' or 'plasma' inclusions of green chlorite.
Lore & History
Historically known as 'Heliotrope' (meaning Sun Turner); ancient Greeks believed it could turn the sun red when placed in water. In Christian lore, it is called the 'Martyr's Stone,' thought to represent the blood of Christ. Currently used in crystal healing for grounding and revitalizing the root chakra.