mineral

Heliotrope (Bloodstone)

Silicon Dioxide (SiO2) with Hematite inclusions

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

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

Identified May 26, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in low-temperature silica-rich groundwater environments, typically hydrothermal veins or as nodules in volcanic rocks through precipitation.

Uses & applications

Primarily used in jewelry (cabochons, beads, signet rings) and as a decorative stone or for lapidary art.

Geological facts

The red spots are caused by inclusions of hematite (iron oxide). Historically, it was believed that the red specks were the blood of Christ, leading to its high value in religious artifacts.

Field identification & locations

Identify by its waxy luster, hardness (cannot be scratched by a knife), and distinctive 'blood' red spots on a dark green base. Found frequently in India, Brazil, Australia, and Germany.

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