This Montana sapphire is amazing the color, cut, and luster are top knotch. The color is a tealy green blue and it's stunning. The cut is a custom design like a modified cushion. The luster is incredible Mike did a great job of bringing this stone to life. The measurements are 9.7x7.1mm talk about a perfect one of a kind ring stone this is it. This Beautiful Montana sapphire is all natural no treatment of any kind.