Tourmaline is a crystalline boron silicate mineral compounded with elements such as aluminum, iron, magnesium, sodium, lithium, or potassium.
Schorl, also known as Black Tourmaline, is the most common form of tourmaline.
It's collected as a mineral specimen, faceted into jewelry pieces, or even in some electric guitar parts.
No random picks from a huge lot.
You will get the same specimen pictured!
