What a beauty! You are going to love the look and color of this ring! It is a 10x10 mm (6 ct) checker cut, genuine mystic fire topaz. The mystic fire topaz IS a natural topaz that has been treated with a vapor disposition process that causes the stone to change colors. This one shows purple, green and a little blue. Surrounding the mystic fire topaz is .10 ctw of round, genuine diamonds. The setting is solid .925 sterling silver. The ring weighs 4.8 grams and only comes in a size 7, sizable by your local jewer.