10k gold will contain a little over 40% gold in its alloy. This means you would require a shade more than 2. 5 ounces of 10k gold to melt into 1 ounce of pure, 24k gold.
10K has. 416 gold. Gold is priced per troy ounce, 31. 1 grams per ounce. You are not going to get rich selling your normal jewelry unless it has interest value.