Bloodstone (also known as heliotrope) and plasma are generally opaque, green, spotted types of chalcedony, employed for decorative carvings and cameos. The green of bloodstone is spotted with red, because of the presence of iron oxides. These distinctive spots appear to resemble blood, and provide the stone its name. Plasma can also be green and could have yellowish spots.
India may be the primary supply of bloodstone, it happens in Brazil, China, Australia and the United States. Plasma is mined in Zimbabwe.
In the center ages, bloodstone was attributed with special powers, since the spots were regarded as the blood of Jesus Christ. In Germany, hematite is also known as bloodstone, which means this variety is called bluestone.
