Mineral

Bloodstone

Heliotrope

Hardness: 6.5-7; Color: Dark green with red to brown-red spots; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.58-2.64

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

Identified June 18, 2026More mineral →

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Physical properties

Hardness: 6.5-7; Color: Dark green with red to brown-red spots; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.58-2.64

Formation & geological history

Formed from silica-rich fluids that crystallize into chalcedony, a cryptocrystalline variety of quartz. The red spots are inclusions of iron oxide or red jasper.

Uses & applications

Used primarily in jewelry, cabochons, carved objects, and as a collector's specimen.

Geological facts

Historically known as Heliotrope, bloodstone was believed to have mystical properties, including the ability to stop bleeding and ward off evil. It is an traditional birthstone for March.

Field identification & locations

Identified by its distinctive dark green color with red inclusions. Commonly found in India, Brazil, Australia, and the USA (California and Nevada). Collectors value pieces with distinct, bright red spots on a deep green background.