One of my favourite local mineral localities is without doubt the Mourne Mountains in County Down. Although they form a relatively small, and not particularly high, range of mountains, they have quite a complex geological history, something which I think makes them very fertile ground for the inquisitive mineral collector.
From albite to zeolites and aquamarine to schorl, there is a super range of minerals to be found. One of my most recent discoveries was a very rare Northern Irish occurrence of fluorite crystals at Pigeon Rock Mountain. While the crystals are only micro size they display a nice variety of shapes, cubic, octahedral and variations of both, plus attractive purple colour zoning.
This photo (fov approx 4mm) shows a cubic crystal with bevelled edges and frosted crystal faces in association with feldspar and smoky quartz crystals.