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Gold Alloys - What Is A Carat? Click here to return to FAQ IndexChard 24 Carat Home Page
A Carat Is 1/24th By Weight
Don't confuse the word "carat" as used for diamonds or other gemstones, when it is a unit of weight.
A carat as applied to gold alloys means a proportion by weight of one part in twenty-four, or 41.66 parts per 1000. The higher the carat value, the higher the proportion of gold in relation to the base metal content. Pure gold is therefore 24 carat.

Percentage by Weight
The following table shows typical "recipes" for different common gold alloys.

Percentages by Weight
AlloyGoldSilverCopperZincNickelPalladium
9 Yellow37.510457.5--
9 White37.804010.411.8-
14 Yellow58.5431.26.3--
14 White58.50.52777-
18 Yellow75169---
18 White7544--17
22 Yellow91.75.52.8---
24100-----



You may wish to visit some of our other pages:-
Allergies to Gold Jewellery
Hardness & Durability of Gold Alloys
What is White Gold?
White Gold Turns Yellow
Density of Gold & Other Metals

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