Peridote
Peridote is the gemstone name of the mineral olivine. This stone is formed in magma rich in magnesium and poor in silica. It has a distinctive olive-green color.
Peridote is a relatively soft stone. It has a hardness of 6.5 - 7 on the Mohs scale, making it softer than Tourmaline.
Most Peridote is mined in Norway.