sentences:  Heavitree stone
  
  Heavitree stone is a type of breccia stone, red in colour, of very coarse texture and prone to weathering, which occurs naturally in the parish of Heavitree near the City of Exeter in Devon, England.It was quarried in the area from about 1350 to the 19th century, and was used to construct many of Exeter's older buildings, including Exeter Castle, the old city walls, and many of the almshouses and parish churches.