Ornaments are usually made up of _______________gold. 

The most priceless metal that is often used to make jewellery or decorations is said to be gold. Noble metal gold is resistant to the majority of acids. The most malleable of all the metals, gold is also said to be.

Since 24 carat gold is essentially 100 percent pure gold, it is too soft to be considered a metal. Due to its softness, gold is regarded as being extremely malleable and ductile (able to be formed into wires) (capability to be hammered into the sheets). A jeweller cannot use 24 carat gold, which is 100% pure gold, in an ornament that must firmly clasp onto another valuable stone or diamond. The remarkable suppleness of the gold is the primary cause. In actuality, 24 karat gold is too fragile and prone to deformation to maintain a tight hold on a gem without slipping or falling out of the jewellery.

Therefore, most jewellers employ 22 carat gold, which is essentially an alloy incorporating a little amount of silver, copper, or other metals to give wear resistance in order to provide a stronger adornment. As a result, 22 carat gold is typically used for decorations.

Therefore, the correct answer is Option (A).