mineral

Bloodstone (Heliotrope)

Chalcedony (SiO2) with inclusions of Iron Oxide or Red Jasper

Hardness: 6.5-7 (Mohs scale); Color: Dark green with spots or streaks of red; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.64

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

Identified March 31, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from groundwater in the cavities of volcanic rocks. The green color is typically caused by chlorite or actinolite needles, while the red is caused by iron oxide. These are most commonly found in secondary alluvial deposits.

Uses & applications

Predominantly used for ornamental purposes, lapidary art, jewelry (specifically signet rings and cabochons), and for its historical significance in alternative medicine and spiritual practices.

Geological facts

In the Middle Ages, the red spots were believed to be the blood of Jesus, and the stone was attributed with magical powers including the ability to stop bleeding. It is the original birthstone for March.

Field identification & locations

Identify by its waxy texture and characteristic 'blood-like' red spatters on a dark forest-green base. It is commonly found in India, Brazil, Australia, and the United States (California). Collectors look for high contrast between the deep green body and vibrant red spotting.

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