# Gold Purity

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Dears I want to calculate the purity of the gold. Plz tell the formula to calculate the purity.

Zalmey

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I hope you don't expect to calculate what can only be measured. Gold used in jewelry and other ornamentation is measured in karats. Pure gold is 24 karat, or 24 K. 75% gold is 18 K, 50% is 12 K, and so on. The karat number is rounded up in much commercial practice, so a lot of 14 K jewelry is in fact only 9/16ths gold.

These ratios are by weight. Since gold is significantly heavier than most of the metals it is commonly alloyed with, a piece of 14 K jewelry is noticeably larger than an 18 K piece of the same weight.

Jerry

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jewelry

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Thanx for the reply but i want to determine the purity by myself. i.e. using some formula. plz help me in this way. thanx again in advance.

• posted