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Schorl

Schorl is the most common variety of tourmaline, the formula NaFe2 + 3Al6 (BO3) 3Si6O18 (OH) 4. The name is according to the place where it was first described, ie Zschorlau (Schorl) in Germany. It is a relatively abundant mineral occurring mainly in pegmatites, granites, and sometimes in hydrothermal veins. The color is black, it is in the form of small crystals to large meter-shaped columnar crystals. More info

Schorl is the most common variety of tourmaline, the formula NaFe2 + 3Al6 (BO3) 3Si6O18 (OH) 4. The name is according to the place where it was first described, ie Zschorlau (Schorl) in Germany. It is a relatively abundant mineral occurring mainly in pegmatites, granites, and sometimes in hydrothermal veins. The color is black, it is in the form of small crystals to large meter-shaped columnar crystals.
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