I was looking at a setting the other day, nothing fancy, about $400, 18K white gold. This seemed fine, but the jeweler wanted $300 for platinum prongs and another $150 or $200 to set one of their own stones in the ring. The price of the actual setting, and the diamond, were pretty reasonable, but the extra $500 for platinum prongs/setting the stone seems high. Am I wrong? What do jewelers normally charge for setting the stone if you buy the setting and stone from them?