Round black tourmaline beads ideal for jewelry making. These round beads are made from authentic and natural black tourmaline and are specially designed for stringing and creating a wide variety of jewelry, such as necklaces and bracelets. There are three available sizes of round black tourmaline beads to choose from: 6 mm, 8 mm, and 10 mm. The beads are presented in strands approximately 38 cm to 40 cm in length, with the price relative to one strand depending on the size of the beads. Black tourmaline is highly sought after due to its distinctive properties.