Topsoil=Bhalo miti Pottery clay= Laal eent ki mitti (any clay which looks reddish has a high iron content and thus can be used) Dolomite= Samundari jhaag (Which is actually aragonite and way better) Muriate of Potash= Don't mess with it, till you have advanced a bit in the hobby. Reason? If you ever used it on your base and planted a plant like sword/crypt/lily, you cant uproot them in atleast a year,if you do the most horrid algal plague will occur in your tank.
"The word Bhaal (Gujarati: ભાલ) (Hindi: भाल) seems to have been derived from the Sanskrit word भाल which means forehead. Such a name is given to this region probably because it is mostly as flat as a forehead with almost entire region's soil without any stones, pebbles or gravel."
Our Bhalu mitti here in Karachi is also very fine without any stones,pebbles,rocks or gravel .