Petrified palm wood is the state stone of Texas and the
state fossil of Louisiana. It comes from
palm trees in the Oligocene Epoch, between 20 - 40 million years ago, give or
take a few years.
The characteristic spotted look of palmwood is from the rod
like structures within the grain of the wood. Depending upon the angle the
lapidary uses to cut the stone, these structures show up as spots, tapering
rods, or lines.
Petrified palm wood is a variety of chalcedony and is very
hard, around 7 1/2 on the Mohs scale of hardness and takes a wonderful polish
which makes it a great stone for jewelry.
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