Ashford Black Marble
... that Derby Museum has a diagram of Ecton Hill made from Ashford Black Marble and other minerals?
... that <a href="./Derby_Museum_and_Art_Gallery" id="mwEk4" rel="mw:WikiLink" title="Derby Museum and Art Gallery">Derby Museum</a> has a diagram of <a href="./Ecton,_Staffordshire" id="mwEk8" rel="mw:WikiLink" title="Ecton, Staffordshire">Ecton Hill</a> <i id="mwElA">(pictured)</i> made from <b id="mwElE"><a href="./Ashford_Black_Marble" id="mwElI" rel="mw:WikiLink" title="Ashford Black Marble">Ashford Black Marble</a></b> and other minerals?