Demantoid garnet
(de'-man-to-id'-gar-net')
19th c.; lat. granatum; gr. adamas
Andradite garnet of very bright green color, the rarest of the garnet, used as a gem
Color
Very bright yellowish green
Family
Calcium and Iron silicate
Chemical composition
Ca3Fe2(SiO4)3
Hardness (Mohs scale)
6,5
Specific gravity
3,84 ±0,03
Refractive index
1,875 ±0,02
Optical character
Single refractive