![]() ![]() ![]() ![]() Briançon, Langeac, Auvergne, France the Åheim Quarry, Møre og Romsdal, Norway Taganana, Tenerife, Canary Islands and Katukubura, near Kolonne, Sri Lanka. Other significant worldwide deposits of Olivine include the Eifel Mountains of Germany Monte Somma, Vesuvius, Italy Mt. Large gemmy Peridot crystals also come from Mogok, Burma (Myanmar). The largest Peridot crystals now come from Pakistan at Sapat Gali, Mansehra, in the Kohistan District. This deposit has produced Peridot since ancient times and has long since been exhausted. John's Island (Zagbargad) in the Red Sea, Egypt, which once produced outstanding large crystals. The most classic source of gem Peridot is St. Peridot is the birthstone for the month of August.Īlso see the gemstone section on Peridot. It is very popular in jewelry, and is used in many jewelry items including rings, bracelets, necklaces, and earrings. Peridot, the transparent olive-green to yellow-green variety, is a well-known gemstone. It is used as a flux for steel production, and is also an important ore of the metal magnesium. Transparent green variety of Olivine that is used as a popular gemstone. Fayalite is usually yellow-brown to brown. Pure Forsterite is colorless, but this is extremely rare. The series ranges from the magnesium end member, Forsterite (Magnesium silicate), through the intermediary member, Olivine (also known as Chrysolite), to the iron end member, Fayalite (Iron silicate).įorsterite and Olivine can be olive-green, light green, dark green, yellow-green, yellow-brown, and brown. There are other rarer members of the Olive group such as Tephroite. ![]() The mineral Tephroite (Mn 2SiO 4), which many consider a member of the Olivine group, forms a series with Forsterite. The intermediary variety, Olivine, is not scientifically recognized as a separate mineral, but is nevertheless well-established. The Olivine group is composed of the following primary members: ![]()
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