Question

a piece of jewelry is made up of 18k it means the jewelry is made up of what

Answer 1

gold because 18k means 18 karats

Answer 2

The gold jewellery's purity is measured by the karat unit.One karat unit defines the 41.66 fineness of the gold.

The 24 karat gold is one of the most purest types of gold which consists almost null percentage of other alloy metals as the impurity.

Similarly the 18 karat gold means that the gold is 75 percent pure gold and the rest 25 percent is other metallic alloys apart from gold.