Plate 47
A piece of gypsum looking on the surface of the perfect cleavage, and showing the two other cleavages as lines, intersecting at 66°. Twinning is also shown
A simple crystal of gypsum
Twin crystals of gypsum
A piece of gypsum looking on the surface of the perfect cleavage, and showing the two other cleavages as lines, intersecting at 66°. Twinning is also shown
A simple crystal of gypsum
Twin crystals of gypsum