PERIDOT or OLIVINE

Chemistry: Magnesium, iron silicate (Mg, Fe)2SiO4
Colore: Yellowish green
Crystal system: Rombic
RI: 1.65-1.69
SG: 3.32-3.37
Mohs Hardness: 6.5 - 7
Description: Gem variety of the mineral Olivine