mineral

Pink Tourmaline (Rubellite)

Elbaite - Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3OH

Hardness: 7-7.5 (Mohs scale); Color: Pink to rosy red; Luster: Vitreous; Crystal structure: Trigonal/Hexagonal (often long, striated prisms); Cleavage: Indistinct; Specific Gravity: 3.06

Hardness: 7-7
Color: Pink to rosy red
Luster: Vitreous

Identified March 15, 2026More mineral →

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Physical properties

Hardness: 7-7.5 (Mohs scale); Color: Pink to rosy red; Luster: Vitreous; Crystal structure: Trigonal/Hexagonal (often long, striated prisms); Cleavage: Indistinct; Specific Gravity: 3.06

Formation & geological history

Formed in granitic pegmatites through hydrothermal processes over millions of years, often associated with lithium-rich environments during the final stages of magma crystallization.

Uses & applications

High-quality specimens are used as gemstones in jewelry; industrial use includes pressure sensors due to piezoelectric properties; heavily sought after by mineral collectors.

Geological facts

Tourmaline is unique because it is both pyroelectric (generates electricity when heated) and piezoelectric (generates electricity under pressure). The pink variety is the birthstone for October.

Field identification & locations

Identify in the field by looking for triangular cross-sections, vertical striations along the crystal length, and its inability to be scratched by a steel knife. Found in Brazil, Madagascar, and California, USA.

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