Bloodstone
Chalcedony var. Bloodstone (Heliotrope) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal symmetry; Cryptocrystalline (microscopic aggregates); Habit is massive or as rounded river-worn nodules.
Mineral Group
Silicates (Tectosilicate); Quartz group (Chalcedony family)
Chemical Formula
SiO2 (Silicon Dioxide) with Fe2O3 (Hematite) inclusions
Formation Process
Bloodstone forms via precipitation of silica-rich fluids in cavities and fractures of volcanic rocks or sedimentary environments at relatively low temperatures.
About This Crystal
An opaque, dark forest-green chalcedony marked by small, scattered red spots of Jasper or Iron Oxide (Hematite). It displays a dull to waxy luster on fracture surfaces and is characterized by a dense, fine-grained texture.
Physical Characteristics
Color: Dark green with red speckles; Streak: White; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.58–2.64; Tenacity: Brittle but tough due to interlocking structure; Fluorescence: Typically inert.
Optical Properties
Refractive Index: 1.530–1.543; Birefringence: Weak to none (aggregated); Pleochroism: None; Luster: Vitreous to waxy; Transparency: Opaque.
Hardness & Durability
Origin Region
India (primary source), Brazil, Australia, China, and the United States. Typically found in low-temperature hydrothermal environments or volcanic cavities.
Hardness & Durability
Mohs Hardness: 6.5–7; Toughness: High (very durable for daily wear); Stability: Stable to light, but sensitive to high heat and harsh chemicals.
Care & Maintenance
Clean with warm soapy water and a soft brush. Avoid ultrasonic cleaners and steam cleaning. Store away from harder stones like diamonds or sapphires to prevent scratching.
Rarity & Value
Relatively common and affordable. Value is determined by the balance of the deep green body color and the intensity/distribution of the red 'blood' spots. Rough material is inexpensive.
Special Characteristics
The red inclusions are specifically Jasper or Hematite that create the distinctive 'blood' droplets against the green plasma base.
Lore & History
Historically known as Heliotrope (from Greek 'sun-turning'). In the Middle Ages, the red spots were thought to be the blood of Christ. Traditionally used as an amulet for protection, vitality, and courage; associated with the Root and Heart chakras.