Peridot!

Peridot is found in rocks created by volcanoes and there are even some cut peridots that came out of a meteorite that fell in Siberia in 1749.  Fine peridot is mined in Burma, Pakistan and Arizona.  Because of it's association with volcanic rock formations, Hawaiian legend claims that peridots are the tears of Pele, Goddess of the volcano.  The Romans called peridot "evening emerald" since its green color did not darken at night but was still visible by lamplight. 

Lore...Peridot has been long considered to be an aid to friendship and supposedly frees the mind of envious thoughts.  Other legends credit Peridot with bringing happiness and good cheer, attracting lovers, and strengthening the eyes.