Peridot

Peridot is a green colored, semi-precious gemstone from the Olivine mineral family. As an astrological substitute of emerald, it is worn to promote intelligence, communication skills and good health. Peridot (pronounced pair-uh-doe) is the gem form of Olivine, a magnesium iron silicate mineral of the forsterite-fayalite family, with the amount of iron being responsible for the color. While Olivine is an abundant mineral, gem-quality Peridot is rather rare, especially in larger stones.