Rock/Mineralized Nodule
Tiffany Stone
Fluorite-bearing Opalized Breccia
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
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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.
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