mineral

Bloodstone (Heliotrope)

SiO2 (Silicon Dioxide with inclusions of Chlorite, Amphibole, or Hematite)

AI-generated identification · may be incorrect

Hardness: 6.5 to 7 on the Mohs scale. Color: Deep dark green with distinctive red, brownish, or orange spots. Luster: Vitreous to waxy when polished. Crystal Structure: Microcrystalline/Cryptocrystalline trigonal chalcedony. Cleavage: None (conchoidal fracture). Specific Gravity: 2.61.

Hardness: 6
Luster: Vitreous to waxy when polished

Identified July 23, 2026More mineral →

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Physical properties

Formation & geological history

Formed in low-temperature hydrothermal environments where silica-rich fluids deposit microcrystalline quartz in cavities and fractures. The green coloration comes from chlorite or amphibole inclusions, while the red spots are caused by iron oxide (hematite) inclusions.

Uses & applications

Widely used in lapidary work, including polished tumbled stones, beads, cabochons, carved amulets, rings, and traditional signet rings. Popular among gemstone collectors and for metaphysical practices.

Geological facts

Bloodstone is one of the traditional birthstones for March. In ancient times, the red spots were believed to represent drops of blood, giving the stone historical association with healing, sacrifice, and mystical protection. It was heavily used in Christian art and carving during the Middle Ages.

Field identification & locations

Identified by its rich forest green body color speckled with distinct red blood-like spots. Commonly found in India, Australia, Brazil, Madagascar, South Africa, and the United States. Highly prized in polished tumbled form.