Sale of Gold and Silver against Gold and Silver
2127. If gold is sold against gold or silver is sold against silver, whether it is in the form of coins or otherwise, in case the weight of one of them is more than that of the other, the transaction is Haraam and void.
2128. If gold is sold against silver or silver is sold against gold, the transaction is valid and it is not necessary that the weight of both the commodity should be equal.
2129. If gold or silver is sold against gold or silver, it is necessary for the seller and the buyer that before they separate from each other, they should deliver the commodity and its exchange to each other. In addition, if even a part of the thing about which agreement has been made, is not delivered to the person concerned, the transaction becomes void.
2130. If either the seller or the buyer delivers the full stock as agreed, but the other person delivers only a part of his stock, although the transaction of that amount is valid, however, the person who has not received the entire stock can cancel the transaction.
2131. If silver dust from a mine is sold against pure silver, and gold dust from a mine is sold against pure gold, the transaction is void. However, there is no harm is selling silver dust against gold or gold dust against silver.