A pale-green or yellow-green gemstone
of the olivine
tells me it's "specifically gem
, given as the same thing is Webster 1913
's writeup, is really a generic term for gems of the same color, including chrysoberyl
. Some peridots have wound up labeled as emerald
s if they had a deep enough color, and historically peridot was considered to be the same thing as topaz
and the Red Sea
island where it was first mined was even called Topazios (it's now Zabargad
), but modern mineralogy
sorted out their different compositions.
Currently almost 80% of peridot on the market comes from Arizona, but many other locations produce small amounts. Peridot itself is not rare, but large crystals of the stone are.