وعليكم السلام ورحمة الله وبركاته Zakat is obligatory on the gold that has been stored for a period of one year if it has reached the Nisab , and that is 85 grams of pure gold. And the Zakat should be payed on the total amount of gold and not only on that which exceeds 85 grams . Also if the gold is not pure then the Nisab will increase according to the gold's carat . And the same rule applies to the gold that is worn , stored , kept in the bank , or for trade , or for dowry , or something else as long as it is in your possession . And Allah عز وجل knows best .