EVERYDAY SCIENCE

Detailed explanation-1: -Lower caratages contain less gold; 18 carat gold contains 75 per cent gold and 25 per cent other metals, often copper or silver. The minimum caratage for an item to be called gold varies by country.

Detailed explanation-2: -So, What is 21K Gold? 21K gold is a verified gold value, and it has extremely high purity. 21K on a stamp for a bracelet or earrings or ring is considered a piece that is a 21-karat purity out of a maximum of 24 karat purity. 21K gold has received a purity rating of 87.5% gold at a minimum and a 12.5% alloy.

Detailed explanation-3: -The 18 karat gold is 75% pure and 25% alloy metals, 22 karat gold is 92% pure and 8% alloy metals, and 24 karat gold is 100% pure.

Detailed explanation-4: -The reason for this is the exceptional softness of gold. 24 karat gold is so soft, that it could easily be deformed and lose its firm grip on a jewel and allow it to slip or fall out of your ornament. Hence, order to have an ornament that is stronger. Most jewellers use 22 karat gold which is an alloy.