This specimen has a split personality, with an aggregate of yellow fluorite cubes up to 8 mm on edge on one side and another aggregate of modified cubic pyrite crystals to 10 mm on the other side.  A few calcite crystals to 10 mm are thrown in for good measure.  Aside from where it was detached from the pocket wall, the fluorites and pyrites are undamaged, although a couple of the calcites are dinged. Still a very pretty piece!