As a newbie I am curious as to how much should I pay for a piece of jewelry. As the buyer I want the most bang for my buck, don't want to be ripped off, yet at the same time want to be fair to a seller in case I want other pieces in the future. What I'm looking for is a jewelry calculator that I can put in total weight on metal, diamond, and other gemstones (eg sapphirs, emeralds, rubies) and it will give me the current market price for that piece, regardless of craftmanship, -- this way I can determine how much the craftmanship's worth to me. Can anyone guide me to this calculator, or at the least a price calculator or chart for sapphire, emeralds, and rubies? Thanks.