Tourmaline is a crystalline boron silicate mineral containing elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gemstone comes in a wide variety of colours.
Tourmaline has a variety of colours. Usually, iron-rich tourmalines are black to bluish-black to deep brown, while magnesium-rich varieties are brown to yellow, and lithium-rich tourmalines are almost any colour: blue, green, red, yellow, pink, etc. Rarely, it is colorless. Bi-colored and multicoloured crystals are common, reflecting variations of fluid chemistry during crystallization. Crystals may be green at one end and pink at the other, or green on the outside and pink inside; this type is called watermelon tourmaline.
Tourmaline stones of different colours are usually cut into beads and made into bracelets. It is trendy to put on a bracelet of tourmaline beads on one's wrist.
|A green tourmaline bracelet|
|This gem quality tourmaline is very expensive|
|Gemstone quality tourmaline|
|A remarkable raw tourmaline|
|A pink tourmaline necklace is equally lovely|
|Blue tourmaline, a rare piece|