How to Find The Purity of Gold, Silver and Platinum
For Gold Jewelry made in the United States or Canada it should be stamped 14K, 18K, 22K or some number greater then 9 and less then 24 with a “K” or “kt” after it. Since 10K is the minimum purity in the U.S. that an item can be sold as “Gold” and 24K is rarely used for making jewelry. The “K” stands for Karat. A Karat is a measure of gold purity. This is sometimes confused with Carat, which is a unit of weight used for diamonds and other gemstones that is equal to 200 milligrams.
1 Karat equals 1/24 of the whole. An alloy made of 14 parts pure gold and 10 parts of copper or some other metal is known as 14K or 14 Karat gold…18 parts pure gold and 6 parts of another metal, is 18K or 18 Karat Gold. Read More