This is the gemological name for a
beautiful green gemstone known to geologists as olivine. Used as an ornament since
antiquity, it has been mined in Egypt, Burma, Pakistan, and Arizona.
Volcanic vents on the San Carlos Apache Reservation, east of Phoenix, let
loose millions of tons of molten rock and ash, containing perhaps the largest deposit of
peridot in the world.
Olivine (not the gem variety) makes up most of the upper mantle of the Earth,
and is even found in meteorites from deep space.
and diamonds, set in
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