mineral

Opalite

Synthetic Opalised Glass

Hardness: 5-6 Mohs. Color: Translucent to milky blue with an amber/orange glow when light passes through. Luster: Vitreous/Glassy. Structure: Amorphous. Cleavage: Conchoidal fracture.

Hardness: 5-6 Mohs
Luster: Vitreous/Glassy

Identified July 7, 2026More mineral →

Explore Opalite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 5-6 Mohs. Color: Translucent to milky blue with an amber/orange glow when light passes through. Luster: Vitreous/Glassy. Structure: Amorphous. Cleavage: Conchoidal fracture.

Formation & geological history

Opalite is a man-made variety of glass designed to mimic the opalescence of natural opal. It is created by melting silica and adding metallic compounds like copper or gold to create the signature light scattering effect known as the Tyndall effect.

Uses & applications

Primarily used for decorative purposes, jewelry (pendants, beads, rings), crystal healing practices, and as a pocket stone or worry stone for collectors.

Geological facts

While often sold under the name 'Sea Opal' or 'Opal Moonstone,' it is entirely synthetic. Its most striking feature is its dichroic property: it appears blue against a dark background but glows peach-orange when light is shone through it.

Field identification & locations

Identify by looking for small air bubbles (common in glass) and the very consistent, milky blue sheen that lacks the 'flash' or 'fire' of genuine natural opal. It feels like glass to the touch and has a distinct orange cast when held to a light source.