DEAR SIR, WE HAVE Mineral ore CONTAING 24-30 % SILICON, AND MAGNESIUM 11-30%, fe 15-20 % calcium SILICON CARBIDE quartz bauxite china clay industrial mineral,AND ALSO FERRO CALCIUM CONTAIN OTHER . WE DEAL IN MINERALS IF INTRESTED PLEASE CONTACT SO THAT WE CAN SEND SAMPLE. MY CELL NO IS 09510599800 THANKING YOU RIYAZ KHAN