mineral

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Iron Oxide or Chlorite

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Dark green with red/brown spots; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.64

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 scale); Color: Dark green with red/brown spots; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.64

Formation & geological history

Formed through the deposition of silica-rich groundwater in the voids or fractures of other rocks. The red spots are caused by inclusions of hematite (iron oxide), while the green body color comes from chlorite or actinolite.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and seal stones. It is also a popular specimen for mineral collectors and metaphysical practitioners.

Geological facts

In the Middle Ages, the red spots were believed to be the blood of Christ. It is the traditional birthstone for March and was once used in ancient times as an amulet to stop bleeding and improve circulation.

Field identification & locations

Identify in the field by its characteristic 'opaque' dark green body with distinct red spotting. It has a conchoidal fracture. Commonly found in India, Brazil, Australia, and the United States (California).