This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Resembling stone or a stone.

adj. (of bone especially the temporal bone) resembling stone in hardness

"It was only when its triple row of mouths smiled that Will realized it was not stone after all, just a creature of hard gray stonelike skin."

hard   

rocklike   

stone-like    blunt-featured    stereographic    horse-like    hamlike