noun which may take the genitive case particle 'no'
stone; made of stone
Used as a no-adjective to describe objects, structures, or materials made of stone.
This stone sculpture is very old.
石製の道具が発掘された。
Stone tools were excavated.
stone artifact; article made of stone
miniature stone replicas of tools, mirrors, effigies, weapons, etc. used in Kofun-period burials and rituals
Compound of 石 (stone) and 製 (made of). The reading せきせい follows standard on'yomi.