Bloodstone / Heliotrope

Hardness: 6.5-7 on Mohs scale. Color: Dark green with distinctive red, orange, or brown spots (due to hematite inclusions). Luster: Vitreous to waxy. Crystal Structure: Trigonal (microcrystalline quartz). Cleavage: None (fractures conchoidally). Specific Gravity: 2.58-2.64.

Bloodstone is formed in deposits from hydrological processes, typically as a secondary mineral in igneous rocks or as detrital material in placers. The green color is due to chlorite or hornblende inclusions, while the red spots are caused by iron oxide minerals, primarily hematite. It is usually found in cracks and fissures of volcanic rocks. Geological Age: Varies depending on formation location, but often associated with ancient volcanic activity.

Historically, bloodstone has been revered for its perceived mystical properties. In ancient times, it was believed to be dried blood and was used as an amulet for protection and healing. Modern uses include: jewelry (cabochons, beads, carvings), ornamental objects, and as a collector's stone due to its unique appearance. It is also sometimes used for small sculptures and intaglios.

Also known as Heliotrope, which means 'sun-turner' in Greek, due to a historic belief that if placed in water, it would reflect the sun as blood-red. It was highly valued in the Middle Ages and Renaissance as a talisman and was believed to have miraculous powers, including the ability to stop bleeding. Some legends claim the red flecks represent the blood of Christ, hence the name 'Bloodstone'. The most sought-after specimens have vivid red spotting on a dark green background.

In the field, bloodstone is identified by its opaque, dark green color with distinct red or reddish-brown spots or streaks. Its hardness (will scratch glass) and waxy luster when polished are also good indicators. It typically occurs as nodules or jaspers. Common locations include India (the primary source), Australia, Brazil, China, the United States (California, Oregon, Washington), and parts of Eastern Europe. When purchasing polished beads or cabochons, look for a good contrast between the dark green matrix and the red spots. Avoid pieces that are too dark with indistinguishable spots or ones with dull colors.