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Tourmaline is a group of minerals that come in many colors and are often used as gemstones. Tourmaline is hard enough to be used in jewelry and can be carved into large, transparent crystals.

Description

Color: Tourmaline can be colorless, black, brown, red, orange, yellow, green, blue, violet, pink, or bi-colored.

Hardness: Tourmaline has a hardness of 7.5 on the Moh's scale of hardness.

Composition: Tourmaline is a silicate mineral that contains boron, aluminum, and other elements.

Pyroelectricity: Tourmaline becomes electrically charged when heated or squeezed.

Types of tourmaline

Elbaite: A variety of tourmaline that can be green, blue, yellow, pink, red, or colorless

Schorl: An iron tourmaline that is usually black in color

Dravite: A magnesium tourmaline that is usually brown in color

Rubellite: A pink alkali tourmaline

Brazilian emerald: A green alkali tourmaline

Achroite: A colorless alkali tourmaline

Uses

Tourmaline is the birthstone for October and the gem of the eighth anniversary.

Tourmaline is used in jewelry, including rings.