mineral

Bloodstone

Heliotrope (Cryptocrystalline Quartz, SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5–7 Mohs. Color: Deep green with red inclusions of hematite. Luster: Vitreous to waxy. Crystal structure: Trigonal (microcrystalline). Cleavage: None. Specific gravity: 2.58–2.91.

Hardness: 6
Color: Deep green with red inclusions of hematite
Luster: Vitreous to waxy

Identified July 2, 2026More mineral →

Explore Bloodstone in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 6.5–7 Mohs. Color: Deep green with red inclusions of hematite. Luster: Vitreous to waxy. Crystal structure: Trigonal (microcrystalline). Cleavage: None. Specific gravity: 2.58–2.91.

Formation & geological history

Formed at shallow depths through precipitation from silica-rich groundwater in cavities of other rocks. The red spots are caused by iron oxide (hematite) impurities.

Uses & applications

Used primarily in lapidary arts for jewelry, carvings, and as a birthstone for March. Historically used for signet rings and amulets.

Geological facts

Also known as Heliotrope, which means 'sun turner.' In ancient times, it was believed that when placed in water, the reflection of the sun would turn red. It was also once used to stop bleeding in medieval folklore.

Field identification & locations

Look for a dark green, opaque chalcedony body with distinct red specks. It is common in riverbeds or as tumbled stones from India, Brazil, Australia, and the USA.