Rock Identifier
Bloodstone (Chalcedony (Variety: Bloodstone / Heliotrope), SiO2) — mineral
mineral

Bloodstone

Chalcedony (Variety: Bloodstone / Heliotrope), SiO2

AI-generated identification · may be incorrect

Hardness: 6.5 to 7 on the Mohs scale. Color: Dark green with characteristic red or brown spots of iron oxide (hematite). Luster: Vitreous to waxy. Crystal structure: Trigonal (microcrystalline quartz). Cleavage: None (exhibits conchoidal fracture). Specific gravity: 2.58 to 2.64.

Hardness
6
Luster
Vitreous to waxy
Identified More mineral →
Explore Bloodstone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App StoreGoogle Play

Physical properties

Hardness: 6.5 to 7 on the Mohs scale. Color: Dark green with characteristic red or brown spots of iron oxide (hematite). Luster: Vitreous to waxy. Crystal structure: Trigonal (microcrystalline quartz). Cleavage: None (exhibits conchoidal fracture). Specific gravity: 2.58 to 2.64.

Formation & geological history

Formed through the deposition of silica-rich groundwater in cavities and fractures of existing rocks at low temperatures, typically within sedimentary or volcanic environments.

Uses & applications

Used in ornamental carvings, cabochons, signet rings, and as a collector gemstone.

Geological facts

Historically known as heliotrope, meaning "sun-turner," because ancient writers claimed it turned the sun red when immersed in water.

Field identification & locations

Identified by its opaque dark green base color combined with distinct red spots. Commonly found in India, Brazil, Australia, and the USA.

More like this

Other mineral specimens

Mineral Sand (Heavy Mineral Sand Concentrate) (Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite) — mineral

Mineral Sand (Heavy Mineral Sand Concentrate)

Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite

mineral
Sandstone (with potential mineral staining/concretions) (Arenite (SiO2 based)) — sedimentary

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary
Soil with Mineral Detritus and Quartz Fragments (Regolith / Silicate Mineral Aggregate) — sedimentary

Soil with Mineral Detritus and Quartz Fragments

Regolith / Silicate Mineral Aggregate

sedimentary
Limonite / Goethite (Iron Ore Mineral nodule) (FeO(OH)·nH2O / FeO(OH)) — mineral

Limonite / Goethite (Iron Ore Mineral nodule)

FeO(OH)·nH2O / FeO(OH)

mineral
Septarian Pebble (Septarian nodule / Concretion) — sedimentary

Septarian Pebble

Septarian nodule / Concretion

sedimentary
Schist (Schist) — Metamorphic

Schist

Schist

Metamorphic