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Diamond weight is expressed in karats. The
karat comes from the first measure used at the beginnings : carob seed
which had the distinctive feature of keeping a constant weight in spite
of weather and season. The karat is divided in one hundred points, and
correspond to 0,2 grams.
Like this, a 50 points or
50/oo diamond will weight half a karat so 0,1 gr. Big stones are rare,
and for equal quality, two stones of 1 karat are less valuable than a
2 karats stone.
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