mineral

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Hardness: 5.5-6 (Mohs scale), Color: Translucent to milky with opalescent sheen (blue/orange), Luster: Vitreous/Glassy, Crystal Structure: Amorphous

Hardness: 5
Luster: Vitreous/Glassy, Crystal Structure: Amorphous

Identified July 20, 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: 5.5-6 (Mohs scale), Color: Translucent to milky with opalescent sheen (blue/orange), Luster: Vitreous/Glassy, Crystal Structure: Amorphous

Formation & geological history

While it mimics the look of natural opal, Opalite is a man-made glass (often synthetic opal) created by fusing dolomite and metal oxides in a laboratory. It is designed to simulate the adularescence seen in natural moonstone or opal.

Uses & applications

Primarily used in jewelry, as tumbled stones for healing practices, decorative cabochons, and as a collector's item for those interested in semi-precious synthetic stones.

Geological facts

Opalite is often confused with Sea Opal or Girasol Opal. It is unique among synthetics because its blue-to-yellow color change depends on whether the light is passing through it or reflecting off of it.

Field identification & locations

Look for a very uniform milky appearance and the presence of small air bubbles within the material, which distinguish it from natural opal or moonstone. It will appear blue against dark backgrounds and yellowish-peach when held up to the light.