Sentence:  Very durable grey granite has been quarried near Aberdeen for more than 300 years, and blocked and dressed paving "<WSD>setts</WSD>," kerb and building stones, and monumental and other ornamental work of granite have long been exported from the district to all parts of the world. 
Meaning of the word marked with <WSD> tags:  (stone) A small, square-cut piece of quarried stone used for paving and edging.