mineraloid (synthetic)
Opalite
Man-made Glass (SiO2 + additives)
Hardness: 5-5.5 (Mohs scale); Color: Translucent white to milky blue with an orange/gold glow when light passes through; Luster: Vitreous/Glassy; Structure: Amorphous; Cleavage: None (conchoidal fracture); Specific Gravity: ~2.4-2.5
- Hardness
- 5-5
- Luster
- Vitreous/Glassy
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Physical properties
Hardness: 5-5.5 (Mohs scale); Color: Translucent white to milky blue with an orange/gold glow when light passes through; Luster: Vitreous/Glassy; Structure: Amorphous; Cleavage: None (conchoidal fracture); Specific Gravity: ~2.4-2.5
Formation & geological history
Opalite is a synthetic, man-made material. It is created in industrial settings by melting silica (sand) and mixing it with metal oxides or other additives to achieve the opalescent effect. It does not have a natural geological age.
Uses & applications
Primarily used in the jewelry industry for beads and cabochons, decorative items, healing crystals (metaphysical purposes), and mass-market collectibles.
Geological facts
Opalite is frequently mistaken for or marketed as natural 'Sea Opal' or 'Moonstone,' but it is actually a form of decorative glass. It exhibits the Tyndall effect, which causes light to scatter, making the stone appear blue against dark backgrounds and orange when light shines through it.
Field identification & locations
Identify by its uniform translucency and the absence of internal natural inclusions or 'fire' (play-of-color) seen in real opal. In the field (market), it is recognizable by its too-perfect appearance and lack of matrix rock.
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