Cubic, gemmy and lustrous crystals of fluorite on matrix from world famous locality - Rogerley Mine. Fluorite cubes are in great color - green in artificial light with a strong blue daylight fluorescence, and an even stronger purple-white fluorescence under long wave UV light. This amazing fluorite crystals change color in different lights - in natural light they are blue, in artificial light they are green. Crystals size up to 3 cm. Some contacts.