emery

a rough grey powder used for sharpening tools and polishing metal surfaces

arena de emery, polvo abrasivo

• emery powder

Collocations use emery paper · polish with emery cloth

• He used emery paper to polish the metal.

  Usó papel de lija de emery para pulir el metal.

a dark blue or black gemstone used in jewellery and as an abrasive

piedra de emery, zafiro negro

• emery stone

Collocations emery ring · emery bracelet

• She wore an emery ring on her finger.

  Llevaba un anillo de emery en el dedo.