mineral

Bloodstone

Heliotrope (Cryptocrystalline Quartz, SiO2)

Hardness: 6.5–7 on Mohs scale; Color: Dark green with red spots/streaks; Luster: Vitreous to waxy; Crystal structure: Hexagonal (trigonal microcrystalline); Cleavage: None; SG: 2.6–2.7.

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

Identified May 25, 2026More mineral →

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Physical properties

Hardness: 6.5–7 on Mohs scale; Color: Dark green with red spots/streaks; Luster: Vitreous to waxy; Crystal structure: Hexagonal (trigonal microcrystalline); Cleavage: None; SG: 2.6–2.7.

Formation & geological history

Formed at low temperatures through the precipitation of silica from groundwater in fractures and cavities of other rocks. The red spots are caused by inclusions of hematite (iron oxide).

Uses & applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular collector's mineral. Historically used for signet rings and amulets.

Geological facts

Also known as Heliotrope, which means 'sun turn' in Greek. Ancient legends claimed the red spots were formed from the blood of Christ falling on green jasper during the crucifixion.

Field identification & locations

Identify by its characteristic forest-green base with distinct red speckling. Commonly found in riverbeds or as pebbles in India, Brazil, Australia, and the United States (California).

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