Fluorite

This thumbnail specimen features several sharp, well-formed, highly lustrous fluorite cubes with razor-sharp edges, attractively perched on a sparkly, brecciated limestone matrix. The crystal shows a translucent yellow-brown interior with colourless outer zones. Under ultraviolet light, the fluorite displays a fascinating ghostly white fluorescence, a hallmark of material from this locality. The crystals are in great condition.

The specimen comes from the well-known "Flamboro" limestone quarry in Flamborough, Ontario, operated by Dufferin Aggregates. Fluorite from this quarry is highly sought after. The crystals are often compared to classic fluorites from Clay Center, Ohio, but are considerably rarer in Ontario. Access to the quarry is strictly controlled, with only limited, supervised club visits permitted, and even then successful finds are difficult.