Tourmaline (Chemical equation NaR3Al6[Si6O18][BO3]3(OH,F)4) belongs to the trigonal crystal system and occurs as long,  slender to thick prismatic and columnar crystals that are usually triangular in cross-section, vitreous luster, resinous luster in sections, It is transparent to translucent and non cleavage with 7.0 - 7.5 Mohs hardness range and Specific gravity range from 2.98 to 3.20, Tourmaline shows pyroelectricity in addition to the piezoelectric, the tourmaline can generate negative air ions spontaneously and emit far infrared rays due to It's unique polar crystal structure.

Specifications:

Packaging terms:  25kg/bag or as customer's requirment.

Delivery terms:      7-15 days after confirming payment.

    Lingshou county zhongrun minerals co.,ltd.founded in 1988, We are a company covers an area of 100000 square meters and sepcialized in developing, producing, sales and service on nonmetallic minerals and fiber. Our factory is located in lingshou county shijiazhuang city hebei province china. Our own mine can offer a quality-assured products and our clients can avail them from us at industry leading price.

    Processed by our skilled professionals at our up to date processing unit keeping in mind set industry quality norms.Processed using superb quality raw material and  three times of  screening processes.

    We have introduced the advanced production facilities and testing& inspection equipment, having a galaxy of experienced management personnel and professional technical personnel, which assure good quality.