M E N U « Home | Browse Minerals | QuizzesMinerals by letter: All | K | G | O | A | H | T | P | C | Q | N | Z | S | E | W | M | B | F | D | L Minerals by class: Silicates | Halides | Carbonates | Sulfates | Oxides | Phosphates | Hydroxides | Native elements | Sulfides Silicate Subclasses: Nesosilicates | Pyroxenes | Amphiboles | Frameworks | Sorosilicates | Cyclosilicates | Phyllosilicates    Click on a mineral for more details. M i n e r a l s   SilicateTourmaline Na(Mg,Fe,Li,Mn,Al)3Al6(BO3)3Si6O18(OH,F)4 Most distinguishing features: Columnar crystals and vertical striations are characteristic, also has poor cleavage. Industrial/economical uses: Gemstone. Due to piezoelectric properties, it is also used in the manufacture of pressure gauges and other electronic components.

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