Color: Green, in different intensities. Most valuable pieces are the green grass green, very similar to the emerald best qualities.
Hardness: 7 Mohs scale
Crystal system: Cubic
Specific gravity: 3.4 - 3.6
Refractive index: 1730-1760
Dispersión: valor medio de 0.028
Gem type of the garnet group that belongs to the Ugrandite series. It has different shades of green de to chromium and vanadium. It's name is given because of the discovery place, Park Tsavo in Kenia in 1970.