mineral

Opalite

Man-made Glass (Synthetic Opalized Glass)

Hardness: 5.5-6.0 on Mohs scale; Color: Translucent to milky white with a blue or yellow glow; Luster: Vitreous; Crystal structure: Amorphous; Cleavage: None (conchoidal fracture); Specific gravity: 2.4-2.5

Hardness: 5
Color: Translucent to milky white with a blue or yellow glow
Luster: Vitreous

Identified June 27, 2026More mineral →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Opalite is a synthetic, man-made glass produced in industrial settings. It is created by melting silica and other minerals, then cooling them quickly. It is not a natural geological formation and does not have a geological age.

Uses & applications

Primarily used in jewelry (beads, pendants, rings), decorative items, meditation tools, and as a popular specimen for rock collectors and metaphysical enthusiasts.

Geological facts

Although often marketed as a natural stone or 'sea opal,' Opalite is actually glass. It exhibits the Tyndall effect, which causes it to appear blue against a dark background and orange/amber when light is shone through it.

Field identification & locations

Identify by its perfect clarity compared to natural opal and its signature 'glow.' Unlike natural moonstone or opal, it usually contains tiny air bubbles from the glass manufacturing process. It is sold globally in metaphysical and gem shops.