pots, obelisks, and other decorative items of amb were frequently traded during the late 18th and early 19th century. john mawe had a museum in matlock bath that dealt in black marble. ann rayner carved black marble into pictures using a diamond. many art objects of ashford black marble are collected in local institutions, including those of derby museum, buxton museum, and chatsworth house. in 2009, huge blocks of ashford black marble were found underground in derby. the auction of these was planed because these blocks are valuable. the rocks might have been abandoned when an "ashford black marble" manufacturer moved in the 1880s.