Glass

A type of glass, opalite makes a particularly convincing moonstone simulant. (Don't confuse it with opaline, an opal-like silica found in bamboo trees). Silver and black Christmas earrings featuring opalite, Swavorski crystal, and sterling silver. Photo by j3jewelry. Licensed under CC By-ND 2.0.

Article: Moonstone Buying Guide

Credit: j3jewelry