Diamonds carats - Diamonds

Why on Diamonds is carats referring to weight but on Gold it refers to purity.?

It seems odd doesn't it.
im hoping for a wiser answer than IKD like the other question that was almost the same as this had.


The little talk "carat" comes from the Greek for "carob". Carob seeds were acquainted with as units of weight. The reason carat (or karat) is now worn for gold purity is because a certain volume of pure gold weighs one carat.

Diamond Carat Size

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Diamonds carats - News


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