Bi-color Tourmaline Gemstones

  • Hardness

    7.0 on the Mohs scale.

  • Occurrence

    Madagascar, North America, Brazil, Myanmar (Burma), Africa, Siberia, Australia, Sri Lanka (Ceylon). Tourmaline and opal are the birthstones of the month of October. Tourmaline is the national gemstone of the United States.

  • Appearance

    Tourmaline of different colors often form within the same crystal. These are can be quite varied in appearance.

  • Enhancements

    Occasionally heat treated to improve color.

    More information on gemstone enhancements.

  • Gemstone Family

    Bi-color Tourmaline is a member of the Tourmaline gemstone family.