mineral

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Hardness: 6.5-7 (Mohs); Color: Dark green with red/brown spots; Luster: Vitreous to waxy; Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.6-2.7

Hardness: 6
Color: Dark green with red/brown spots
Luster: Vitreous to waxy

Identified March 25, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Dark green with red/brown spots; Luster: Vitreous to waxy; Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.6-2.7

Formation & geological history

Formed at low temperatures through the precipitation of silica from groundwater in the cavities of igneous rocks. The red spots are caused by inclusions of hematite (iron oxide).

Uses & applications

Primary use is in jewelry (cabochons, beads, and signet rings), ornamental carvings, and it is a popular specimen for crystal collecting and metaphysical purposes.

Geological facts

In the Middle Ages, the red spots were believed to be the blood of Christ. It is a traditional birthstone for March and was famously used in Babylonian cylinder seals.

Field identification & locations

Identify by its 'forest green' base color and distinct red-to-orange flecks. Commonly found in India, Brazil, Australia, and the western United States. It will scratch glass but cannot be scratched by a steel knife.

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