Meaning Of The Word Tourmaline

Real Dictionary

What's the definition of Tourmaline? Find Tourmaline meanings, definitions and more at the Real Dictionary online.

Tourmaline Meaning

Tourmaline Definition
Tourmaline Definition

What's The Definition Of Tourmaline?

tourmaline in American English
a very hard, piezoelectric, rhombohedral mineral, (Na,Ca)(Mg,Fe,Al, Li)3Al6(BO3)3(Si6O18)(OH)4, of various colors, used as a gem and in making pressure gauges
noun: any of a group of silicate minerals of complex composition, containing boron, aluminum, etc., usually black but having various colored, transparent varieties used as gems

tourmaline in British English
noun: any of a group of hard glassy minerals of variable colour consisting of complex borosilicates of aluminium with quantities of lithium, sodium, calcium, potassium, iron, and magnesium in hexagonal crystalline form: used in optical and electrical equipment

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