emeril

noun2

1. •
   (no longer used) emery

   • Inferior nor to thee, thou Jernsey, bravelie crown’d With rough-imbatteld rocks, whose venom-hating ground The hardned Emerill hath, which thou abroad doost send: — 1612
2. •
   (no longer used) A glazier's diamond.

   • a hard and sharp Stone called Emerill, which is used by Lapidaries for the cleansing , cutting , and burnishing their precious Stones — 1740