sedimentary

Heliotrope (Bloodstone) Sphere

Cryptocrystalline Quartz (SiO2 with Iron Oxide inclusions)

AI-generated identification · may be incorrect

Hardness: 6.5–7 on Mohs scale. Color: Deep dark green with inclusions of red, brown, or yellow. Luster: Vitreous to waxy. Crystal structure: Trigonal (microcrystalline). Specific gravity: 2.6–2.7.

Hardness: 6
Color: Deep dark green with inclusions of red, brown, or yellow
Luster: Vitreous to waxy

Identified July 12, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed at low temperatures from silica-rich groundwater percolating through fractures in rocks, where it precipitates as chalcedony. The red/brown spots are caused by inclusions of hematite or iron oxide minerals.

Uses & applications

Commonly used in jewelry (cabochons, beads), decorative spheres for collecting, and lapidary art. Historically used for signet rings and amulets.

Geological facts

Legend in the Middle Ages claimed the red spots in bloodstone were formed from the blood of Jesus dripping onto green jasper during the crucifixion. It is one of the traditional birthstones for March.

Field identification & locations

Identify by its characteristic forest green body with distinct red or brownish spots. Look for a smooth, waxy polish in manufactured spheres. It is predominantly found in India, Brazil, Australia, and the USA.