text: appraisal on gold wieght? value  of ring purchased by friend some variables include karat value. 24k is pure gold. 14 karat, or carat is 14 parts gold to 10 parts some other metal such as silver or nickel.  next would be spot price of gold at the time you sell it. right now it is over $550 per "troy" ounce which is 31.1 grams. is it solid gold or plated, age of the piece, hallmarkings, condition, and craftsmanship are other criteria used to determine value.