8mm Black Tourmaline In Quartz/Tourmaline Quartz Beads Bracelet (7 inches / 17.5 cm) Tourmaline Quartz bead stretch bracelet. Tourmaline Quartz, also known as Tourmalinated Quartz, is a variety of Clear Quartz with naturally occuring needle-like inclusions of Black Tourmaline, also known as Schorl. Assembled in Japan. Beads Size: 8 mm, Length: 16.5cm or 6.5 inch Elastic Cord free gift box