ITEM NAME:Natural Black Tourmaline Crystal Rough Stones Rock Mineral Gravel Specimen AU Descriptio n New 100% and in high quality... Introduction Type: natural stone Note : Mineral called tourmaline (live rock), is a natural crystal gemstones, tourmaline is a natural multi-element mineral, the main ingredients are magnesium, aluminum, iron, boron and other 10 kinds of trace elements beneficial to human body, it has unique piezoelectric effect and the thermoelectric effect, in the nature of these two effects simultaneously with the crystal is very rare, very high practical value. 1986, the United States Institute of Legg high-tech Co., Ltd., was found: when tourmaline was crushed, an increase of energy ..1986, the United States Institute of Legg high-tech Co., Ltd., was found: when tourmaline was crushed, an increase of energy. Material: Tourmaline Crystal Stone. Type: natural stone. 1pc small stone.
