Iron Sulfide with White “Mushroom” Calcite

This intriguing specimen features iron sulfide matrix adorned with clusters of delicate white mushroom-shaped calcite, creating a soft, sculptural contrast against the darker host rock. The calcite forms overlapping, rounded caps with a frosted, semi-translucent appearance, giving the piece a coral- or fungal-like texture that is especially eye-catching in person.

Under UV light, the calcite exhibits a subtle pink fluorescence, adding an unexpected layer of interest for UV collectors. The glow is gentle rather than overpowering, rewarding closer inspection and making this specimen a great crossover piece for both aesthetic and fluorescent mineral collections.