Have any old gold jewelry that you would like to turn into cash? Now is the time to sell it with gold reaching a high of $1,908 an ounce. Anything marked 10-karat means that it has 42 percent gold content and 58 percent other metals. 14-karat gold is actually 58 percent pure gold and about 75 percent of the content of 18-karat jewelery is gold. Therefore, a 14-karat gold ring that weighed about an ounce would be worth $1,106.64 or 58 percent of $1,908 the current market value, from there, a seller could expect to receive an offer of around 60 percent to 80 percent for the ring.