metamorphic
Ruby in Fuchsite
Corundum (Al2O3) in Chrome-Mica (KAl2(AlSi3O10)(OH)2)
Hardness: 9.0 (Ruby) and 2.0-3.0 (Fuchsite); Color: Pink to red inclusions in a green to brownish-green matrix; Luster: Vitreous to pearly; Crystal structure: Trigonal (Ruby) and Monoclinic (Fuchsite); Specific Gravity: 2.8-4.0 (mixed).
- Hardness
- 9
- Color
- Pink to red inclusions in a green to brownish-green matrix
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 9.0 (Ruby) and 2.0-3.0 (Fuchsite); Color: Pink to red inclusions in a green to brownish-green matrix; Luster: Vitreous to pearly; Crystal structure: Trigonal (Ruby) and Monoclinic (Fuchsite); Specific Gravity: 2.8-4.0 (mixed).
Formation & geological history
Formed through regional metamorphism. Often found in schist or gneiss where aluminum-rich solutions crystallize into corundum within a chromium-rich mica matrix. Most specimens are from the Precambrian era.
Uses & applications
Primarily used for decorative carvings, lapidary arts like cabochons/beads, and by mineral collectors. It is also a popular specimen in metaphysical circles.
Geological facts
While often confused with Ruby in Zoisite, 'Ruby in Fuchsite' can be distinguished by a blue-grey ring of Kyanite sometimes surrounding the rubies and its significantly lower hardness compared to Zoisite.
Field identification & locations
Identify by looking for pink/red hexagonal corundum crystals embedded in a soft, micaceous green/brown background. Common locations include India, Brazil, and parts of Russia.
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