I recently visited a quarry site and brought home a rock sample that had two clusters of cubic crystals on its surface. I am unsure what the mineral is, I think it may be fluorite but I am not certain. The crystals are light brown and rather small.
The quarry is roughly 50m deep and most of the rock is pelite and schist with significant amounts of quartz throughout.
If any pictures are unclear or more information is needed I will edit this question to suit as best I can.