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  • Tourmaline is a crystal silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium.
  • Tourmaline has a variety of colors, 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 color: blue, green, red, yellow, pink etc.
  • The name comes from the Sinhalese word "turamali" or "toramalli", which applied to different gemstones found in Ceylon.
  • The tourmaline mineral group is chemically one of the most complicated groups of silicate minerals. Its composition varies widely because of isomorphous replacement.


  • The complex color zoning of the polychrome tourmaline reflects a dynamic multistage crystallization process.

  • Granitic pegmatites typically are not rich in Ca,and any amounts present may be consumed by the early crystallization of plagioclase and Ca-bearing tourmaline.

  • composition of gem tourmaline, chemical data were also obtained for several samples from other localities that are known or suspected to produce liddicoatite


  • Afghanistan is blessed to have some of the most plentiful reserves of gem and semiprecious stones in the world, including  emeralds, rubies, tourmaline, lapis lazuli, kunzite and aquamarines.

  • A newly discovered deposit of yellow and yellow-green tourmaline produced about 1,000 carats per month.

  • Gemstone sales were expected to remain stable or show a slight increase in 2002, although demand for aquamarine and yellow tourmaline was expected to be  strong.


  • Tourmaline compositions have long been used as a useful exploration guide in several types of economically important ore deposits.

  • Black Tourmaline is a great stone for travelers. It will help keep jet lag and time disorientation at bay and, placed under your pillow, it will bring restful, easy sleep.

  • leg injury that needs casting, see if your doctor will embed a piece of Black tourmaline in the plaster to aid in healing. Its grounding energy will also make it easier to get around while you are injured.

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