Ross-Simons - .70ct t. w. Amethyst, .40ct t. w. Sky Blue Topaz Ring, Diamond Accents Over Sterling. Size 8. Vibrant berry hues. Our elegantly styled ring sparkles with .70 ct. t. w. amethyst and .40 ct. t. w. sky blue topaz rounds. Finely crafted in polished 18kt yellow gold over sterling silver with sparkling diamond accents and milgrain details. Black rhodium. 1" wide. Sky blue topaz and amethyst ring. Amethyst birthstones are the perfect gift for February birthdays.