Where is Opalite found?

Opalite occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.

Where to find Opalite

Collecting tips

1. Check for Play-of-Color. Natural precious opal exhibits a true 'play-of-color' (diffraction of light into spectral colors) that shifts with angle. Opalite typically shows a more uniform opalescence or adularescence-like sheen, without distinct flashes of spectral colors.
2. Examine Transparency and Inclusions. Opalite is often very clear or uniformly milky. Natural opals may have natural inclusions, matrix material, or variations in transparency. Glass Opalite may show tiny bubbles or flow lines under magnification.
3. Consider Price. Opalite is significantly less expensive than natural precious opal or high-quality moonstone. An unusually low price for an 'opal' should raise suspicion.
4. Hardness Test (with caution). Glass Opalite typically has a Mohs hardness of 5.5-6, similar to natural opal. Resin Opalite will be softer (Mohs 2-4). This can help distinguish it from harder minerals, but should be done carefully to avoid damage.

Quick Check

Color:

Milky blue to white, often with an orange/pink glow when backlit.

Luster:

Vitreous (glassy) to resinous.

Streak:

White (for glass or resin).

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