mineral
Bloodstone (Heliotrope)
SiO2 (Cryptocrystalline Quartz / Chalcedony)
Hardness 6.5-7 on the Mohs scale, dark green to brownish-black color with speckles of red jasper (iron oxide inclusions), vitreous to waxy luster, trigonal microcrystalline structure, conchoidal fracture.
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Physical properties
Hardness 6.5-7 on the Mohs scale, dark green to brownish-black color with speckles of red jasper (iron oxide inclusions), vitreous to waxy luster, trigonal microcrystalline structure, conchoidal fracture.
Formation & geological history
Formed at low temperatures by precipitation of silica-rich groundwater within cavities and fractures of sedimentary and volcanic rocks.
Uses & applications
Popular as a tumbled pocket stone, used in cabochons for jewelry, decorative carvings, and highly valued by gem collectors and crystal enthusiasts.
Geological facts
Also known as Heliotrope, which comes from ancient Greek meaning 'to turn the sun', referring to how the mineral reflected light when submerged in water.
Field identification & locations
Identified by its dark green, dark brown, or black base color combined with distinct spots or flecks of red or orange jasper. Found globally, notably in India, Brazil, Australia, and the USA.
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