mineral

Heliotrope (Bloodstone)

Cryptocrystalline Quartz (SiO2) with inclusions of Hematite (Fe2O3)

Hardness: 6.5-7 (Mohs scale); Color: Dark green base with red jasper/hematite flecks; Luster: Vitreous to waxy; Structure: Hexagonal/Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.6-2.7

Hardness: 6
Color: Dark green base with red jasper/hematite flecks
Luster: Vitreous to waxy

Identified March 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed from the precipitation of silica in groundwater at low temperatures, filling cavities in igneous or sedimentary rocks. It often occurs as nodules or in mass veins within basaltic rocks.

Uses & applications

Primarily used in jewelry (cabochons, beads, signet rings), ornamental carvings, and as a birthstone for March. Historically used for seals and intaglios.

Geological facts

Christian legend accounts for the red spots as being the blood of Christ that dripped onto green jasper at the foot of the cross. In ancient times, it was believed to give the wearer the power to control weather and stop hemorrhages.

Field identification & locations

Identify by its waxy luster and distinctive red-on-green pattern after wetting or polishing. Commonly found in riverbeds or beaches in India, Brazil, Australia, and parts of the United States (California). Collectors look for high contrast between the green and red colors.

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