It should be true; In different tourmaline gems, the color of tourmaline will be different because of the different proportion and types of chromogenic ions. In fact, tourmaline with only one color is rare. Generally, each tourmaline crystal will present several tones and colors. They not only have a wide range of colors, but also show a very obvious "dichroism". When you look at this gem from different angles, tourmaline will show different colors, or at least different color intensities. Therefore, when cutting tourmaline crystals, gem cutters always try to present the most beautiful colors to people from the best perspective. Tourmaline is very suitable for making jewelry because of its good hardness. Its hardness index is 7 to 7.5 on the Mohs hardness scale.