plural of heart of stone

(figuratively, idiomatic) A stonehearted character, stern or cruel nature.

Synonym of lithographic limestone

A durable yellowish sandstone with high iron oxide content.

(mineralogy) A Cornish serpentine.

Alternative spelling of stumbling stone

A limestone from the Headington Quarry area of Oxford, England, historically much used in building.

A type of hard limestone from the Isle of Purbeck, used for building and paving.

simple past tense and past participle of stone wall

present participle of stone wall