Fantastic example of sulfur on bitumen, completely natural, with excellent aesthetic value. Perfect crystallization which makes the shapes of the crystal surfaces clearly visible. Moreover, this double-sided! specimen is characterized by intense yellow bipyramidal crystals. All this gives the specimen in question sophistication, elegance and high aesthetic value. Also with a strong fluorescence.reaction of the aragonite in pink, especially under long wave UV. Under short wave it shows a white reaction with phosphorescence. From long closed mine!