5 Carat Emerald Cut Diamond Engagement Ring in Platinum5 Carat Emerald Cut Diamond Engagement Ring in Platinum. This massive 5 carat emerald cut diamond is seated above a stepped down design of trapezoid cut diamond accents and finished in platinum. This impressive ring makes use of the intersecting lines created from the bezel settings to create a scaled look that tapers down the shoulders. A fabulous ring that will be cherished for generations!