UV-reactive Mangano Calcite Sphere, crystal ball, mangano calcite sphere, pink calcite crystal, crystal sphereDiameter 14. 5 cm Weight 4544g ( Conversion: 1 inch = 2. 5 Cm ) Please note that this is a natural product, sometimes stones and crystals have small imperfections and blemishes. Mangano calcite appears pale pink under natural or normal light, but glows a vivid hot pink under UV lighting (also known as black light). A longwave 365 nm or a 395 nm light is recommended. Make sure to double check measurements and view all the photos before making a