Quartz Crystal Tourmaline Natural Black Rough Rock Mineral Healing Stone

Descriptions: The electrical stone is also called tomalin, "tourmaline", the chemical composition is complex, it is a kind of silicate mineral containing boron, including aluminum, sodium, iron, magnesium and lithium. this stone is made of natural tourmaline rough rock, irregular shape is a perfect craft decoration. You can use it to decorate hydroponic plant and fish tank,and can used for purifying water, for sauna, for Buddha, for feng shui,  raising flowers and grass, etc Specifications: Material: natural tourmaline stone Color: black Shape:as the picture Length: 5-7cm/1.96-2.75inch Weight: approx.100g Package Included: 1 pc x tourmaline stone Note: 1. The total weight error is ±10g 2. Natural mineral product, different sizes, colors and patterns are natural phenomena, and each product can't be exactly the same!