Image: <a rel="nofollow" class="external text" href="https://www.flickr.com/people/47445767@N05">James St. John</a> (CC BY 2.0)
trigonalcommonSilicates
Bloodstone
SiO2
Bloodstone is a variety of chalcedony, characterized by its deep green color (plasma) with distinctive red spots or patches (jasper). It is a chert-like rock composed of cryptocrystalline quartz.
Bloodstone Physical Properties
Mohs Hardness
6.5Crystal System
trigonalLuster
vitreousStreak Color
whiteCleavage
noneFracture
conchoidalSpecific Gravity
2.58Colors
deep green, deep redTransparency
translucent to opaqueType Locality
India (Deccan Traps), Australia, Brazil, China, USAMineral Group
SilicatesUses
jewelry, carvings, ornamental stone, collectorAssociated Minerals
chalcedony, jasper, agate, zeolites, calciteRarity
commonGeological Context
Bloodstone typically forms as a secondary mineral in hydrothermally altered volcanic rocks, often filling amygdales in basalt. It is commonly found in regions with extensive volcanic activity, such as the Deccan Traps.
