Possable sardonyx appearence?

Sardonyx main colors were from the teaser image the crewniverse posted, sard and onyx's colors are based off the actual gem.
Also sard (and to the same extent sardonyx) only have the little heart thing in their eye because i thought it looked cute and decided to keep it.
Height com paired to steven, Sard would be a little bit shorter, and Sardonyx would be a little over twice his height (he'd make it to the band on her jacket/shirt/thing)