Bloodstone

Physical Properties

Hardness: 6.5–7 (Mohs); Color: Dark green with red inclusions; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58–2.64

Formation & Geological History

Formed through the precipitation of silica from groundwater in the cavities or veins of igneous rocks. The red spots are caused by inclusions of iron oxides such as hematite.

Uses & Applications

Predominantly used as a gemstone for jewelry (rings, pendants), decorative carvings, and as a popular collector's stone for its unique 'blood-spattered' appearance.

Geological Facts

In the Middle Ages, the red spots were believed to be the blood of Christ, leading to its popular use in religious carvings. It is the original traditional birthstone for March.

Field Identification & Locations

Identify by its opaque dark green base and distinct red spotting. Common locations include India (the primary source), Brazil, Australia, Germany, and the United States (California).

Identified on: 4/13/2026

Mode: Standard