Big, well formed, lustrous, gemmy fluorite twin from world famous locality - Rogerly Mine. Lustrous fluorite cubes in top color - dark emerald green with a strong blue daylight fluorescence, and an even strong 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. Silky luster becouse of slight natutal etching on crystal faces. A biggest crystal size: 4.0 x 3.5 cm. Aesthetic!