Wiktionary
agatelike
a. Resembling or characteristic of agate.
Usage examples of "agatelike".
It would be easy-even flattering--to accept this protestation of hardheaded friendship at face value, but the agatelike eyes and that faintest shadow of a sardonic smile that flickered at the corners of his mouth made Raphael cautious, uncertain.
The brim of his hat cut off his hair--except at the sides, where it was sheared too close to show any distinctive color--but his eyes were gray and agatelike under thick, dark brows.