Rock/Mineralized Nodule

Tiffany Stone

Fluorite-bearing Opalized Breccia

AI-generated identification · may be incorrect

Hardness: 5-5.5 (varies due to mixed composition). Color: predominantly purple, white, and cream. Luster: Vitreous to waxy. Structure: Massive/Brecciated.

Hardness: 5-5
Color: predominantly purple, white, and cream
Luster: Vitreous to waxy

Identified June 18, 2026More rock/mineralized nodule →

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Physical properties

Hardness: 5-5.5 (varies due to mixed composition). Color: predominantly purple, white, and cream. Luster: Vitreous to waxy. Structure: Massive/Brecciated.

Formation & geological history

Formed through the replacement of limestone and dolomite by silica (opal and chalcedony) and fluorite, typically in volcanic environments.

Uses & applications

Primarily used as a lapidary material for cabochons, carvings, and jewelry.

Geological facts

Also known as Opalized Fluorite, Bertrandite, or Ice Cream Stone. It is famous for its rarity and vibrant purple hues.

Field identification & locations

Identified by its distinct purple and white mottled or brecciated appearance. It is exclusively found at the Brush Wellman beryllium mine in the Spor Mountain area of Utah, USA.