Is zakat due on jewellery, ornaments and other items containing gold or silver?

Zakat is obligatory on gold and silver, whichever form they are in for example, ornaments, coins, or ingots. If there is a mixture of metals, then the amount of gold or silver should be determined and zakat is to be paid on it. Some scholars say that if half or more of the mixed metal is gold or silver then zakat is due on it.