Here we have a SUPER AESTHETIC English Fluorite specimen from well known Heights Mine of Weardale in Durham with unusual colouration. Actually these Fluorite crystals are green and changing due to their daylight fluorescence the colour in the sunlight into electric blue. These crystals here a naturally blue-violet and get a deeper and more saturated colour in the daylight. They are superbly TWINNED as well, super gemmy and razor sharp. They are also super lustrous and there is no significant imperfection worth to report. For highest aesthetic demands and MUCH BETTER IN PERSON !!!