Mineral

Bloodstone

Chalcedony (Quartz)

Hardness: 6.5-7 on the Mohs scale. Color: Dark green with red to brown spots. Luster: Vitreous to waxy. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.58-2.64.

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

Identified June 17, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on the Mohs scale. Color: Dark green with red to brown spots. Luster: Vitreous to waxy. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.58-2.64.

Formation & geological history

Formed in cavities and fractures of various rock types, often associated with volcanic activity. The red spots are typically caused by iron oxide inclusions.

Uses & applications

Often used in jewelry, carvings, and as a gemstone. It is also collected for its unique appearance.

Geological facts

Bloodstone has been used historically for carved seals and intaglios. It is sometimes called heliotrope.

Field identification & locations

Identify by its characteristic dark green color with red to reddish-brown spots. It is commonly found in India, Brazil, China, Australia, and the United States. Collectors look for pieces with distinct, bright red spots.