#hearthstone  a stone that forms a hearth
  supertype:  stone  building material consisting of a piece of rock hewn in a definite shape for a special purpose; "he wanted a special stone to mark the site"
  part of:  fireplace__open_fireplace__hearth  an open recess in a wall at the base of a chimney where a fire can be built
     part of:  chimney  a vertical flue that provides a path through which smoke from a fire is carried away through the wall or roof of a building

No statement uses or specializes hearthstone; click here to add one.