gemstone

Opalite

Synthetic Glass (Simulated Moonstone/Opal)

Hardness: 5-6.5 on Mohs scale; Color: Milky white with blue/orange opalescence; Luster: Vitreous; Crystal structure: Amorphous; Cleavage: None/Conchoidal fracture; Specific gravity: Approx 2.4-2.6

Hardness: 5-6
Color: Milky white with blue/orange opalescence
Luster: Vitreous

Identified July 12, 2026More gemstone →

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Physical properties

Hardness: 5-6.5 on Mohs scale; Color: Milky white with blue/orange opalescence; Luster: Vitreous; Crystal structure: Amorphous; Cleavage: None/Conchoidal fracture; Specific gravity: Approx 2.4-2.6

Formation & geological history

Opalite is a man-made variety of glass, though the term was historically used for impure varieties of natural opal (common opal). It is manufactured by melting silica and adding opacifiers or metallic oxides to create the characteristic blue glow and amber transmission.

Uses & applications

Primarily used in jewelry making (beads, cabochons), metaphysical healing practices, and as decorative tumbled stones for collectors.

Geological facts

Unlike natural opal which is formed from silica-rich water in sedimentary layers, opalite is an industrial glass product. It is often referred to as 'Sea Opal' or 'Opal Moonstone' to appeal to buyers in the crystal market.

Field identification & locations

Identify by its perfect clarity, lack of natural inclusions, and the 'Tyndall effect' which makes it appear blue against dark backgrounds but orange/amber when held against light. It is commonly sold in crystal shops worldwide.