FOLIATION n.
The property, possessed by some crystalline rocks, of dividing into plates or slabs, which is due to the cleavage structure of one of the constituents, as mica or hornblende. It may sometimes include slaty structure or cleavage, though the latter is usually independent of any mineral constituent, and transverse to the…
HONE n.
A stone of a fine grit, or a slab, as of metal, covered with an abrading substance or powder, used for sharpening cutting instruments, and especially for setting razors; an oilstone. Tusser. Hone slateSee Polishing slate. -- Hone stone, one of several kinds of stone used for hones. See Novaculite.