TourmalineTourmaline is a semi-precious stone that exists in a wide variety of colors: black, blue, brown, yellow, pink, green etc. Bi-colored Tourmaline crystals are common. Some crystals are pink at one end, and green at the other end: this type of Tourmaline crystal is called Watermelon Tourmaline. Pictures of Tourmaline on stamps:Stamps featuring images of Tourmaline.Tourmaline - Mozambique - 1979 Tourmaline - Switzerland - 1959 Tourmaline - Togo - 1999 Tourmaline - Brazil - 1989 Tourmaline - United States - 1974 |