These Antique Style Hematite Earrings are a Perfect Example of Metallic Luster.
Photo Courtesy of Lang Antiques.

Metallic luster is the highest luster. Found on gems with a refractive index of 2.5 or higher. Equivalent to the polish on a metal object. Example: Hematite (marcasite)

Submetallic luster is slightly less lustrous than metallic.