Big and cubic crystals of fluorite on matrix from world famous locality - Rogerly Mine. Fluorite cubes are well coloured - 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 colour in different lights - in natural light they are blue, in artificial light they are green.Top color! Etched surfaces and satin luster! Very aesthetic!