gemstone

Polished bloodstone (heliotrope), possibly brecciated jasper

Chalcedony (microcrystalline quartz, SiO₂) with iron-oxide inclusions

AI-generated identification · may be incorrect

Hardness 6.5–7 Mohs; dark green to black, glossy/waxy luster, cryptocrystalline quartz with no visible cleavage; red-orange hematite/jasper inclusions create the bloodstone pattern. The wet, polished surface enhances its color.

Identified August 14, 2026More gemstone →

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Physical properties

Formation & geological history

Forms when silica-rich groundwater fills cavities and fractures, incorporating iron-oxide particles; most material is Paleozoic to younger volcanic-associated chalcedony. Common sources include India, Madagascar, Brazil, Australia, and the United States.

Uses & applications

Used for cabochons, beads, carvings, ornamental objects, and small polished specimens; historically regarded as a protective or medicinal stone.

Geological facts

Classic bloodstone is green chalcedony marked by scattered red hematite or jasper spots; dense red-orange veining may indicate brecciated jasper rather than typical bloodstone.

Field identification & locations

Identify by its opaque dark-green chalcedony body, scattered red inclusions, glassy polish, and lack of cleavage; it should not fizz in dilute acid. Exact identification would benefit from an unpolished surface or hardness testing.