"Sapphires from Montana are set apart from others primarily by their range of attractive colours, the most famous of which is demonstrated here: an unusual, slightly greenish blue. They also tend to be of more even colour than other sapphires, which are prone to patchy colour ‘zoning’ within the stone. These qualities combined to create gems of surpassing charm and enduring appeal, particularly rare in sizes over one carat. With a beautiful cushion-shaped Montana sapphire at its heart and a double border of millegrain-set circular-cut diamonds surrounding it, this is a ring with a difference."