Also known as heliotrope, bloodstone is the traditional March birthstone. This dark green, opaque chalcedony with red to orange spots is a variety of plasma gemstone.
The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.
|Is a Variety of||Chalcedony|
|Colors||Dark green body with red to orange spots|
|Polish Luster||Dull to vitreous|
|Birefringence||0.003 to 0.009|
|Etymology||The red spots may look like drops of blood. The name “heliotrope” is from the Ancient Greek helios and tropein for "sun" and "turning." According to the ancient natural historian Pliny the Elder, this stone gives a red reflection when turned to face the sun while immersed in water.|
|Inclusions||Actinolite, hornblende needles, iron oxides.|
Although bloodstones can be faceted, they are more often cabbed or carved. Like other members of the quartz family, the stone’s hardness makes it an excellent choice for a jewelry stone. The combination of deep green and blood red makes this a visually striking material.
The red to orange spots distinguish bloodstones from plasma gemstones. These spots are caused by the presence of iron oxides such as hematite. However, some bloodstones may have few or no such spots.
Australia; Canada; Czech Republic; Germany; India; Italy; Romania; Slovakia; South Africa; United States.
Blood jasper: Although opaque, single color, oxide-stained chalcedonies are usually considered jaspers, bloodstone is not typically included in that category. It lacks the grainy structure also characteristic of jaspers.
Bloodstone requires no special care. Mild detergent, warm water, and a soft brush are a good choice for cleaning.