Image: James St. John (CC BY 2.0)
cubiccommonSilicates
Bloodstone
SiO2
Bloodstone is a chert-like rock composed of deep green cryptocrystalline quartz (plasma) with distinctive deep red spots, streaks, or patches of jasper.
Bloodstone Physical Properties
Mohs Hardness
7Crystal System
cubicLuster
vitreousStreak Color
WhiteCleavage
NoneFracture
Conchoidal to unevenSpecific Gravity
2.6Colors
deep green, deep redTransparency
Translucent to opaqueType Locality
Provenance often unspecified in literature, but commonly found in IndiaMineral Group
SilicatesUses
jewelry, ornamental stone, carvings, collectorAssociated Minerals
jasper, chalcedony, quartzRarity
commonGeological Context
It forms as a secondary mineral, often in fissures or cavities within volcanic rocks, or as a component of chert in sedimentary environments.
