Mineral
Bloodstone
Chalcedony (Quartz)
AI-generated identification · may be incorrectHardness: 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
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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.
