Last Updated：2025/12/30
Sentence
portions
of
the
original
aragonite—which
make
up
the
nacreous
layers
of
the
pearl—had,
through
“induced
paramorphism,”
as
it
was
known
to
the
artful
sons
of
Nippon,
been
selectively
changed
here
and
there
to
a
different
form
of
calcium
carbonate—namely,
to
microscopic
crystals
of
the
doubly
refracting
calcite
known
as
Iceland
spar.
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portions of the original aragonite—which make up the nacreous layers of the pearl—had, through “induced paramorphism,” as it was known to the artful sons of Nippon, been selectively changed here and there to a different form of calcium carbonate—namely, to microscopic crystals of the doubly refracting calcite known as Iceland spar.
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