Bloodstone
Quartz var. Heliotrope · Semi-Precious Gemstone
Crystal System
Trigonal, microcrystalline crypto-crystalline quartz habit, typically massive or nodular
Mineral Group
Silicates
Chemical Formula
SiO2 with embedded inclusions of green chlorite, hornblende, and red spots of iron oxide (hematite)
Formation Process
Hydrothermal and sedimentary deposition at low temperatures, filling cavities and fractures in rocks
About This Crystal
An opaque, polished tumbled stone displaying a deep dark green background with subtle mottled patterns and lighter patches, characteristic of jasper-chalcedony aggregates
Physical Characteristics
Dark green body color with white to translucent patches, white streak, conchoidal fracture, lack of distinct cleavage, specific gravity of approximately 2.58 to 2.91, vitreous to waxy luster
Optical Properties
Singly refractive aggregate, generally inert under UV light, exhibits a dull to waxy polish
Hardness & Durability
Origin Region
India, Brazil, Australia, USA, and China; found in sedimentary rocks and river beds
Hardness & Durability
Mohs hardness of 6.5 to 7, good toughness making it durable and suitable for various 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
Rarity & Value
Common to uncommon, value depends on the vibrancy of the green color and the balance of contrasting inclusions; generally affordable
Special Characteristics
Features mottled green chalcedony combined with distinct mineral impurities that create its unique opaque patterning
Lore & History
Historically known as heliotrope or the stone of courage, used in ancient times for talismans; associated traditionally with vitality, grounding, and the root chakra