Multi-colors Tourmaline

Tourmaline is a crystalline 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 gemstone comes in a wide variety of colors.

Tourmaline is a complex silicate mineral with a wide range of colors and properties. It is one of the most versatile gemstones, used in jewelry, carvings, and other decorative objects. Tourmaline is also used in a variety of industrial applications, including electronics, optics, and medicine.

Multi-colors Tourmaline
Marvelous Multi-colors Tourmaline From Sapo Mine, Ferruginha, Conselheiro Pena, Doce valley, Minas Gerais, Brazil. Photo Credit: Am Mizunaka FMF

Physical Properties of Tourmaline

  • Mohs hardness: 7 to 7.5
  • Specific gravity: 3.0 to 3.3
  • Color: Tourmaline can be found in a wide range of colors, including black, blue, green, pink, purple, red, yellow, and colorless.
  • Transparency: Tourmaline can be transparent, translucent, or opaque.
  • Luster: Tourmaline has a glassy luster.
  • Cleavage: Tourmaline has three perfect cleavages, which means it can be easily broken along three different planes.
  • Fracture: Tourmaline has a conchoidal fracture, which means it breaks with a smooth, curved surface.


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