8mm Black Tourmaline in Quartz / Tourmaline Quartz Beads Bracelet 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, Choose Length from Pull Down Menu: 16.5cm or 6.5 inch to 18cm Elastic Cord free gift box