Sterling Silver Blue Topaz Pear Shaped Size 7 Pear shaped sea blue topaz with I think cz on either side. I am no jewelry expert, so I am not sure. I do know the jeweler said it is a real blue topaz. Measures 10 x 15 mm in size. Prong mounted and open along the sides so that the light gets up under there to give this Blingy Thing even more sparkle when you wear it. Get it polished up at the jewelers and will be so smooth again along the band which does show light scratching from me wearing it. Estate sale purchase that is bold and beautiful. Stone makes a touch of a sound when in movement, so I think its prongs need to be tightened up a bit too. I don't know why, lighting I guess, but, the stone looks like a deeper richer color here in the pictures than the blue topaz actually is. I just want you to be aware that the stone is a lighter shade than shown and more like the lightest shade of blue that you see in the picture. Insurance is required with this purchase and is reflected in the shipping cost.