Cubic, gemmy and twinned crystals of fluorite on matrix from world famous locality - Rogerly Mine. Fluorite cubes are well coloured - green in colour with a strong blue daylight fluorescence, and an even stronger purple-white fluorescence under long wave UV light. This amazing fluorite crystals change colour in different lights - in natural light they are blue, in artificial light they are green. medium luster. Some demages. Specimen mounted on acrylic base.