UV Reactive Columnar Calcite Cluster Specimen Shungite Hedgehogs are also considered to

Hedgehogs are also considered to be good luck symbols in many cultures

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Approximate Size:Diameter: 73mm (2

This striking calcite specimen is a true beauty

UV Reactive Columnar Calcite Cluster Specimen Shungite Hedgehogs are also considered toThis striking calcite specimen is a true beauty! Under normal light conditions, it appears as solid gray columns of calcite. But when exposed to ultraviolet (UV) light, it transforms into a fiery orange hue. This phenomenon is caused by calcite's property of fluorescence, which refers to its ability to absorb UV light and then emit visible light of a different color. Approximate Size: L: 2. 70" x W: 3. 20" x H: 2. 80" Approximate Weight: 0. 60 lbs.