Clarissa: 1.0ct Oval-cut Russian Ice on Fire CZ Engagement Promise Ring 925 Silver, 3191 Features a 5mm x 7mm, 1.0 carat, Oval-cut Russian Ice on Fire CZ Solitaire. Glamour, style, class, beauty, elegance and pure sophistication: there are just too many adjectives that apply! Made with solid 925 Sterling Silver. Ring weighs approx. 2.2 grams