Truly stunning, the Royal Design Blue Sapphire Engagement Ring is fit for any queen. This ring features a 0.69ct blue sapphire as the center piece. This stone is surrounded by Round Cut diamonds in a channel vintage setting. The diamonds add an eye-catching touch. The total small diamond weight is roughly 0.56 carat, and you can buy this ring in platinum, 18k yellow gold, or 18k white gold.