How very silly this above comment is (as usual). The person giving such "advice" has no realization of human feelings or attachments of love whatsoever. Possibly, he has never loved some one or knows the feelings of love one has for the other partner. His world revolves around money, investments, earnings savings etc. with an "advice" of a delay plan of from 3 days to a week for reasons only best understood by him The list goes on and on and on.
Naniababa; There are many shops at the Gold Souk near the Karwa bus station that sell diamond jewelry. "Pure Gold," Marhaba, Sky Jewelers are some of them. Price would vary from item to item depending on the number of stones, the type and size of the diamonds in the ring. You may need to spend some time there and check various shops to arrive at a decision. Do take a receipt which would provide the details of the diamond such as the weight of the stones and what carat is the ring should it be of gold.