Check the listing for details. UV Reactive Clear Quartz Combination Crystal Cluster on Matrix Mineral Specimen. Condition: Used. Listed at 39.00 USD. The natural crystal is a stunning UV reactive clear quartz combination crystal cluster on matrix mineral specimen. This unique specimen features a variety of crystals and minerals growing on a matrix, creating a visually captivating display. The pink fluorescent, Mangano Calcite, crystals are especially eye-catching when illuminated by UV light, adding a special touch to the piece for collectors of fluorescent minerals and crystal enthusiasts.