Tourmaline is a type of silicate. It is one of the most versatile semiprecious stones, available in various colors, from colorless to black. It presents different colors or depths of color when viewed from different angles, such as turning the stone in the light. The one Lavani uses is the red or pink tourmaline, also known as Rubellite. While many gemstones change color depending on the light source, a true Rubellite shines as brightly in artificial light as it does in daylight, while other pink or red Tourmalines show a visible tinge of brown in artificial light.