Novaculite
Pronunciation : No*vac"u*lite
Part of Speech : n.
Etymology : [L. novacula a sharp knife, razor: cf. F. novaculite.] (Min.)
Definition : Defn: A variety of siliceous slate, of which hones are made; razor stone; Turkey stone; hone stone; whet slate.
Source : Webster's Unabridged Dictionary, 1913