Six prong studs get a modern update with grey moissanite, claw-shaped prongs, and a matte satin finish. Charles & Colvard discontinued the greys a several years ago, so they are in extremely limited supply.

On rare occasions, a natural grey hue can occur during the moissanite crystal growing process. These greys are very chameleon-like, changing from a medium grey in some lighting to a deeper steel-grey in other lighting. Some are eye-clean, while others have subtle micropiping inclusions, which occur naturally during the crystal growing process.