Weardale Steetley Minerals
More recently in the 1980s, at Frazers Hush mine a huge cavity was hit lined with beds of purple fluorite and smaller quantities of galena, calcite and sphalerite whilst, on the 325 level at Cambokeels, zincrich flats were discovered containing superb fluorite and calcite Here, after mining started in the flat, the drillers complained to the management that they couldnt work the area