Bloodstone (Heliotrope)
Quartz var. Bloodstone (Chalcedony species) · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal; Microcrystalline (Cryptocrystalline) structure usually found in massive habits
Mineral Group
Silicates; Tectosilicate (Quartz family)
Chemical Formula
SiO2 (Silicon Dioxide) with Fe2O3 (Iron Oxide/Hematite) inclusions
Formation Process
Hydrothermal; forms from silica-rich groundwater at relatively low temperatures in cavities and veins of volcanic rocks
About This Crystal
An opaque, dark green variety of chalcedony quartz characterized by red, brownish, or yellow spots of iron oxide inclusions. It features a waxy to vitreous luster and a smooth, dense surface texture in tumbled form.
Physical Characteristics
Color: Deep green with red inclusions; Streak: White; Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58–2.64; Tenacity: Brittle but tough due to interlocking micro-structure; Fluorescence: Usually inert.
Optical Properties
Refractive Index: 1.530–1.543; Birefringence: Up to 0.004; Pleochroism: None; Optical Character: Aggregates are typically SR (Singly Refractive) in behavior.
Hardness & Durability
Origin Region
India (primary source), Brazil, Australia, China, and the United States
Hardness & Durability
Mohs Hardness: 6.5 to 7; Toughness: Excellent due to cryptocrystalline structure; Stability: High, stable under most conditions.
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid ultrasonic cleaners if there are fractures; store separately to prevent scratching softer stones.
Rarity & Value
Common; Value is determined by the vividness of the green base and the distribution/boldness of the red 'blood' spots; inexpensive for tumbled specimens.
Special Characteristics
Features characteristic red 'blood-like' spots of Jasper or Hematite; some specimens may show mossy or dendritic patterns within the green matrix.
Lore & History
Historically known as Heliotrope, meaning 'Sun Turner.' In ancient times, it was used in Babylonian seals and by Roman gladiators as a protective amulet. In traditional lore, it is associated with the Root Chakra and believed to represent vitality and physical strength.