,

Tourmaline is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gem comes in a wide variety of colors. (source: Wikipedia) Photos by Michael Marcotte The last photo shows a black Schorl tourmaline crystal with a twin aquamarine crytsal from the Haramosh Mountains in Pakistan Return to List Back to Michael's Hobbies page Back to Michael Marcotte's HomePage