SODA (SODIUM) FELDSPAR This is indian origin minerals used in ceramic porcelain enamel industries we ahve with us all the grades and sizes in lumps and powder in our soda feldspar we have Na2O3= 11.5 % in Rocks/Lumps Na2O3= 10 % in Powder kindly keep post your latest requirement we are able to export you amximum quantity with quality saibabaent07@yahoo.com