You are browsing the archive for luster Archives - AGU Blogosphere.

15 January 2023

Geology Word of the Week: L is for Luster

def. Luster (or Lustre if you use British spelling): The way in which the surface of a mineral or rock interacts with light. Words used by geologists to describe luster include metallic, sub-metallic, dull (or earthy), vitreous, waxy, silky, greasy, pearly, and adamantine.   Luster is a physical property that is used by geologists to help identify minerals and rocks. Other physical properties that geologists use for identification are hardness, …