Marcasite ps. after Calcite

An interesting and rare Marcasite pseudomorph after Calcite from Axbridge Hill in the Mendip Hills, Somerset, England, but not a contender for the most aesthetic specimen!  The Marcasite, probably mixed with Pyrite, forms a partly hollow crude cone after a scalenohedral crystal of Calcite.  This was collected from the spoil heap of an old ochre mine near to an old quarry on Axbridge Hill.  The specimen has an overall coating of orange-buff ochre with an earthy to glossy lustre.