Bloodstone, the birthstone for March, is used as a medicine and an aphrodisiac.

Bloodstone, long considered the birthstone of March, is jasper speckled with iron oxide. (Months were assigned stones and gems from the high-priest’s breastplate of Aaron in the Old Testament or the gems described as the foundations of the New Jerusalem in the Apocalypse, the “Revelation of St. John.”)

Bloodstone was used to heal blood disorders and stop bleeding noses and wounds in Babylon and was carved into amulets to protect against the Evil Eye. Ancient Greeks thought using it in ritual would hasten changes in fortune. Western European Christians in the Middle Ages thought all bloodstones had been splashed with Christ’s blood at the crucifixion and used the stones to curve images of either the Crucifixion or scenes of martyrs’ deaths.

These gems would be pulverized and mixed into egg whites with honey and used to remove poison from snakebites. Knights and soldiers would bring bloodstones with them into battle not only to staunch bleeding but to increase courage and physical strength as well. It was also thought to confer invisibility, a useful skill in battle. It was also used as an aphrodisiac (useful after battle).