Tourmaline is a crystalline boron silicate mineral with several elements compound within it, such as aluminum, iron, sodium, lithium, magnesium or potassium. Tourmaline occurs naturally in a wide variety of colors, usually occurring as black to bluish-black and deep brown. It’s found as yellow, and lithium rich varieties can be almost any color, even pink, green or yellow, etc. Tourmaline gets its name from Tamil turamali which is an Indian word given to a group of gemstones found in the southern parts of the Indian Subcontinent.