mineral
Pink Tourmaline (Rubellite)
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
AI-generated identification · may be incorrectHardness: 7-7.5 (Mohs scale), Color: Pink to reddish-pink/red, Luster: Vitreous, Crystal structure: Trigonal/Hexagonal with striated prismatic crystals, Cleavage: Indistinct, Specific Gravity: 3.0-3.26.
- Hardness
- 7-7
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Physical properties
Hardness: 7-7.5 (Mohs scale), Color: Pink to reddish-pink/red, Luster: Vitreous, Crystal structure: Trigonal/Hexagonal with striated prismatic crystals, Cleavage: Indistinct, Specific Gravity: 3.0-3.26.
Formation & geological history
Formed in granitic pegmatites and metamorphic rocks through hydrothermal processes where boron-rich fluids interact with aluminous rocks. Many major deposits date from the Precambrian to late Mesozoic.
Uses & applications
High-value gemstone for jewelry, piezoelectric components in high-pressure gauges, and highly sought-after mineral specimens for collectors.
Geological facts
Tourmaline is pyroelectric and piezoelectric, meaning it can generate an electrical charge when heated or compressed. Rubellite is the name given to the deepest, most saturated pink or red varieties.
Field identification & locations
Identify by its characteristic vertical striations along the length of the prismatic crystals and its lack of distinct cleavage. Common locations include Brazil, Afghanistan, Madagascar, and the USA (California/Maine).
