資料來源 : pyDict

微晶石英質燧石岩; 緻密石英岩

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Novaculite \No*vac"u*lite\, n. [L. novacula a sharp knife,
   razor: cf. F. novaculite.] (Min.)
   A variety of siliceous slate, of which hones are made; razor
   stone; Turkey stone; hone stone; whet slate.