Bloodstone
(blod'- ston')
13th c.; Ger. bluot, stein , Slav. stena , Sansk. styayate
Green chalcedony sprinkled with red spots resembling blood, aso called heliotrope, used as ornamental stone and sometimes in jewelry
Color
Opaque dark green with red to brownish red spots
Family
Chalcedony - Cryptocristalline quartz
Chemical composition
SiO2
Hardness (Mohs scale)
6,5 - 7
Specific gravity
2,60 ±0,05
Refractive index
1,537 ±0,02
Optical character
None (aggregate)