mineral

Bloodstone (Heliotrope)

Cryptocrystalline Quartz (SiO2 with inclusions of Iron Oxide/Chlorite)

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

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

Identified June 19, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed at low temperatures from silica-rich groundwater percolating through fractures in rocks, typically volcanic or sedimentary, where it picks up chlorite for the green color and iron oxides (Hematite) for the red spots.

Uses & applications

Used extensively in jewelry (cabochons, rings), ornamental carvings, seals, and as a popular collector's gemstone due to its traditional associations.

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 ancient times for signet seals because it does not stick to wax.

Field identification & locations

Identify in the field by its characteristic 'mashed vegetable' dark green color and vibrant red specks. Commonly found in India, Brazil, Australia, and South Africa.

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