Found in lava, meteorites, and deep in the earth's mantle, yellow-green peridot is the extreme gem.
Yellow-green gem variety of the mineral olivine. Found as nodules in volcanic rock, occasionally as crystals lining veins in mountains of Myanmar and Pakistan, and occasionally inside meteorites.
Gem variety of the mineral olivine:
found in peridotite rock from
the earth's upper mantle.
Some peridot is ancient: it's found in
pallasite meteorites, remnants of our
solar system's birth.
In 2005, peridot was found in comet dust brought back from the Stardust robotic space probe.