Aventurine is a young man who has sandy blond medium-length hair and two toned eyes in neon pink and blue.

His outfit consists of a green top with a black choker around the collar, with a keyhole cutout in the shape of a spade. Over his top, he sports a dark blazer, and a long dark overcoat with a fur trim which has roulette wheel detailing on the back. He has card suit imagery and roulette wheels in various places in his design. Including the tops of his shoes and the checkered patterns. 