Check the listing for details. UV Reactive Mangano Calcite. Condition: New. Listed at 15.30 USD. 3x2x.5inch 71g UV Reactive Mangano Calcite is a unique mineral that exhibits a special property of reacting to UV light. When exposed to UV light, this mineral emits a vibrant fluorescent glow, making it a standout piece for collectors of rocks, fossils, and minerals. With its distinctive appearance and UV reactive quality, Mangano Calcite adds an extra element of interest and beauty to any collection of crystals and mineral specimens.