Name:Tourmaline; Properties: transparent and
translucent lump with glassy gloss; Moth hardness:7~8; Category: silicate -
Borosilicate; Polychroism: dichromatism medium to
strong ; Proportion:3.0-3.2; Refractive
index:1.62-1.64; Birefringence:0.018~0.040; Main colors: colorless, rosy, pink,
red, blue, green, yellow, brown, and black; Main elements: aluminum, iron,
magnesium, sodium, lithium, potassium and other
elements; Features:permanent
electricity,activation,narrowing the hydrone water beam,far
infrared effect,containing effective microscale
minerals; Application:water treatment, health
care products.