What is the ruling on taking raw gold and manufacturing it for money, and sometimes exchanging raw gold for manufactured gold while paying a manufacturing fee?

The first transaction is permissible because the money taken is a manufacturing fee. The second transaction is impermissible due to the presence of an increase with one of the two counter-values in the same usurious category, and that is precisely usury (riba); based on the Prophet's (peace be upon him) saying: "Gold for gold... hand to hand, like for like. Whoever gives more or asks for more has engaged in usury." In this case, workmanship has no effect, and the fundamental principle in the chapter of usury is the sale of gold for gold and silver for silver, like for like, whether it is raw, minted, or crafted. The correct procedure is for the customer to sell the gold to the goldsmith or to someone else, and then use its price to buy whatever crafted gold they wish.