Oval Montana Sapphire Ring, This sapphire was mined in Montana, USA, is untreated and showing naturally changes colors in different lighting from slightly greenish blue to slightly bluish green. Sparkling and gorgeous in a cluster setting with montana sapphires and diamonds on either side. The precious things in the world are rare, so there is only one you, The beautiful oval aquamarine engagement ring is made with a classic design and is set with three lovely white diamonds on each side. Main Stone: Aquamarine/Sapphire