Check the listing for details. UV Reactive Mangano Calcite. Condition: New. Listed at 15.00 USD. 80g 2x1x1inch The product is a unique and intriguing piece called UV Reactive Mangano Calcite. This mineral is known for its ability to change color when exposed to ultraviolet light, making it highly sought after by collectors. Its striking appearance and distinctive properties make it a standout addition to any crystal or mineral specimen collection. With its rarity and visual appeal, it is sure to be a standout piece for any enthusiast of rocks, fossils, and minerals.