Purchase Qty. Reference FOB Price
5-499 kg US$4.00
500-4,999 kg US$3.00
5,000-9,999 kg US$2.50
10,000+ kg US$2.00
Product Description
Production Description : Black tourmaline is one of the typical high-temperature minerals.Black tourmaline is an iron-containing black mineral in the tourmaline family. 1.Identifying characteristics : Columnar crystal with longitudinal stripes on the cylindrical surface, spherical triangle in ...