Paki: Heart-cut Simulated Swiss-blue Topaz and IOF CZ Infinity Promise Ring Silver, 3223A Features a Heart-cut 5mm 0.5ct Simulated Swiss-blue Topaz Sapphire solitaire. A beautiful and elegant choice as a promise, friendship or commitment ring! Ring weighs approx. 2.0 grams. Made with Solid 925 Sterling Silver with a protective Rhodium finish.