Hopton-Wood Stone (some write it Hoptonwood or Hopton Wood) is a limestone that is quarried in Derbyshire, near to the market town of Middleton-by-Wirksworth.
It is classed by some as England’s finest stone due to its marble like quality and its ability to be carved (making it suitable for headstones). The popularity of Hopton-Wood Stone can be seen in the list of nationally important buildings that have had Hopton-Wood Stone in their construction. These include Houses of Parliament, Westminster Abbey, the Albert Memorial, Lichfield Cathedral, Calke Abbey, Chatsworth House and more [source Wikipedia]. There is a more detailed list HERE from Wirksworth Parish Records.