The pyramid, n the prism face, m the beveled prism, p the octahedral face, and o the edge of the octahedral faces beveled
The simple type of twinning
A multiple twin where three crystals grow through each other
Forms in which anglesite occurs: l the pyramid face, p the prism face, o the vertical edge of the prism beveled, m the horizontal edge of the prism beveled, n a further beveling of the horizontal edge of the prism. D the tabular, E the prismatic form
Plate 20
A characteristic form in which sphalerite may occur; being the combination of, d the dodecahedron, o the octahedron, and t, a 24-sided figure