Mica, dischi dischi, 0,15 mm di spessore, 9,5 mm di diametro (pacchetto di 20 dischi) 20 pieces of Mica, Disks, 0.15 mm (0.006")  thickness,  size  9.5 mm diameter. Each piece is separated from eah other by paper.
Specific Gravity (water = 1.0): 2.7
Chemical Formula: K2O·Al2O3·SiO2
Hardness on Mohs scale of hardness: 2 - 2.25