- VARIETY OF: Andradite garnet, Ca3 Fe2 Si3 O12.
- USES: Gemstone.
- COLOR: various shades of green.
- INDEX OF REFRACTION: 1.89
- HARDNESS: 6.5 - 7
- CLEAVAGE: none
- CRYSTAL SYSTEM: isometric
Demantoid is one of the gem varieties of the garnet
Its green color is similar to peridot but with a yellowish shading.
Demantoid is not the only green garnet.
and the green grossular
garnet variety called tsavorite
are also cut for gems.
Chromium is the coloring agent of demantoid.