Silliminate basically divide as per Alumina content by Al2O3%.
High Grade Silliminate : High grade Silliminate having above 40 % Al2O%. and 1.5% of Fe2O3%.
Low Grade Silliminate : Low grade Silliminate having below 40 % Al2O%. and 2 % of Fe2O3%.
Ramming Mass Grade Quartzite : Ramming Mass grade Quartzite Sizes varying from 100 mm to 250mm and having about 97 % SiO2 %. and Less than 1.0% of Fe2O3%.
Ferro Grade Quartzite : Ferro grade Quartzite sizes varying from 10mm to 60mm and having about 97 % SiO2 %. and Less than 1.0% of Fe2O3%.