Schorls are unremarkable low-value gems found in sedimentary and metamorphic stone layers, as well as in granite.
In Real Life
Also known as black tourmaline, this variety is by far the most common, constituting an estimated 95% of the world's tourmalines. It is named after the Saxony village of Schorl (curr. Zschorlau) where it was first discovered by German mineralogists.