Peridot Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem Peridot (/ˈpɛrɪdɒt/ or /ˈpɛrɪdoʊ/) (sometimes called chrysolite) is gem-quality olivine and a silicate mineral with the formula of (Mg, Fe)2SiO4. As peridot is a magnesium-rich variety of olivine (forsterite), the formula approaches Mg2SiO4. ABOUT PERIDOT The ancient Egyptians […]