If you're serious about finding out whether your diamond is real or fake, you can put the stone through a fire test. Use a lighter to light the stone for approximately 30 seconds, before dropping it in cold water. If it's a real diamond, the stone will remain unharmed, but if it's fake, it will shatter to pieces.

Diamond Jewelry Consignment Sotheby's, your best and most reliable resource for selling your diamond rings, necklaces, bracelets and other jewelry, holds the current auction record for the highest price paid for any diamond or jewel.

The rarity, difficulties in mining, durability, cut, clarity, color, and carat of diamonds make them expensive and in demand. The four C's determine the value of the stone. The psychological beliefs and myths attached to diamonds are the other reasons that makes them expensive.