Q 4: We buy gold from a dealer
who charges for
the glass stones that can be inserted in the rings and other items. He sells these stones at the price of the gold, and we sell them in the same way.
There is no harm as long as the price is not in the form of gold and the purchaser is aware of this. (Part No. 13; Page No. 474) Moreover, the selling should be made hand to hand when it is done for something other than the gold. Regarding the sale of gold for gold, it is impermissible until the stones are separated from the gold so that the amount of gold may be known, and it may be ensured that equivalent amounts of gold are exchanged hand to hand.
May Allah grant us success. May peace and blessings of Allah be upon our Prophet Muhammad, his family and Companions!