Introducing our remarkable Black Tourmaline Water Charging Coaster, designed to enhance the quality of your drinking water through the potent properties of black tourmaline This coaster not only protects your surfaces but also infuses your water with revitalizing energy and purification Experience the transformative benefits of this unique combination of functionality and natural power. Product Specifications: - Material: Black tourmaline Crystal- Dimensions: Diameter approximately 175-180 mm, thickness approximately 23 to 27 mm.