A beautiful two-tone butterfly prong set with pear-shaped amethyst and blue topaz gemstones sits atop a 2.25mm polished band of rhodium plated sterling silver. Total gemstone weight is .68 of a carat. Wear it alone or in meaningful combinations, guaranteed to fit together perfectly with all of the mix and match Stackable Expressions rings. Topaz gemstone treatment: irradiation. Amethyst gemstone treatment: heat enhanced.