mineral

Opalite

Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)

Hardness: 5-5.5 on Mohs scale; Color: Milky white to translucent with a blue/orange opalescence; Luster: Vitreous side (glassy); Crystal structure: Amorphous; Cleavage: None (conchoidal fracture); Specific gravity: 2.15-2.20.

Hardness: 5-5
Color: Milky white to translucent with a blue/orange opalescence
Luster: Vitreous side (glassy)

Identified March 16, 2026More mineral →

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Physical properties

Formation & geological history

Opalite is a man-made variety of glass created in industrial labs. It is produced by melting silica and other minerals, then cooling it slowly to create the characteristic inner 'glow' known as the Tyndall effect. It does not have a geological age as it is modern and synthetic.

Uses & applications

Primarily used in jewelry (beads, cabochons), decorative carvings, and as a popular 'healing' stone in spiritual/meditative practices. Due to its durability compared to natural opal, it is popular for everyday wear.

Geological facts

While it shares a name with the mineraloid Opal, it is entirely different chemically. Under natural light, it often looks blue, but when held up to a flame or light source (transmitted light), it frequently glows with a warm peach or orange hue.

Field identification & locations

Identify by looking for small bubbles (indicative of glass) and a consistently uniform internal glow that lacks the 'patches' or 'flashes' found in genuine precious opal. It is commonly found in retail gem shops and online marketplaces rather than in nature.

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