“Two etched crystals of beryl var. heliodor from Písek, which still show their original hexagonal crystal form. Historic specimens with two labels of the Vienna dealership Mineralien-Comptoir Julius Böhm, which can be dated to the period from 1925-1938. Larger crystal is 15 x 8 mm in size, the smaller one is 10 x 6 mm. Collection and photo: Sun Yi ”