mineral

Bloodstone (Heliotrope)

Silicon dioxide (SiO2) with iron oxide inclusions

Hardness: 6.5-7 (Mohs); Color: Dark green with red to brownish spots; Luster: Vitreous to waxy; Crystal Structure: Cryptocrystalline/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.65

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

Identified April 10, 2026More mineral →

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Physical properties

Formation & geological history

Formed at low temperatures through the precipitation of silica from groundwater in the fractures and cavities of other rocks. The red spots are caused by inclusions of hematite or iron oxide.

Uses & applications

Used primarily in lapidary arts for jewelry, cabochons, seal stones, and decorative carvings. Highly valued in metaphysical circles as a protective stone.

Geological facts

In antiquity, it was known as Heliotrope, meaning 'sun turner' in Greek, because it was once believed that when placed in water, it would reflect the sun as red. Christian legend claims the red spots represent the blood of Christ.

Field identification & locations

Identify in the field by its distinctive green chalcedony base with red speckled inclusions and its high hardness (it will scratch glass). Commonly found in India, Brazil, Australia, and parts of the United States like California.

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