mineral
Pink Tourmaline (Rubellite)
Elbaite (Tourmaline group) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
AI-generated identification · may be incorrectHardness: 7-7.5 (Mohs scale), Color: Pink to deep red, Luster: Vitreous to sub-vitreous, Crystal structure: Trigonal/Hexagonal elongated prisms, Cleavage: Indistinct/Poor, Specific gravity: 3.06
- Hardness
- 7-7
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Physical properties
Hardness: 7-7.5 (Mohs scale), Color: Pink to deep red, Luster: Vitreous to sub-vitreous, Crystal structure: Trigonal/Hexagonal elongated prisms, Cleavage: Indistinct/Poor, Specific gravity: 3.06
Formation & geological history
Formed in granitic pegmatites and metamorphic rocks through hydrothermal processes. Most specimens date from the Phanerozoic eon, often found in 'pockets' within volcanic rock formations.
Uses & applications
Used primarily in fine jewelry as a semi-precious gemstone. Also used in high-pressure gauges and acoustic devices due to its piezoelectric and pyroelectric properties.
Geological facts
Pink tourmaline is often associated with emotional healing and is a birthstone for October. It can become electrically charged when heated (pyroelectricity) or rubbed (piezoelectricity).
Field identification & locations
Identify by its elongated, striated trigonal prisms and absence of distinct cleavage. Common locations include Brazil, Afghanistan, Madagascar, and the United States (California and Maine).
