Bloodstone (Heliotrope)

Chalcedony

6.5–7Hardness (Mohs)

SiO₂Chemistry

1Known origins & mines

Dark green chalcedony spotted red with iron oxide, once believed to hold Christ's blood at Calvary. India's Kathiawar peninsula is the classic source; Madagascar and Australia supply darker material. March's traditional alternate birthstone.

Known origins & mines

Kathiawar Bloodstone Belt · India

Active mining · Legendary locality

The classical heliotrope source praised by Pliny — Kathiawar peninsula green chalcedony with red spots served Christian relic carvings and B…

Mineral family: Chalcedony

Chrysoprase Agate Black Onyx Jasper Blue Chalcedony Carnelian