There are many varieties of granites. The big slabs without breaks and cuts, are usually priced high, between Rs50/- to Rs350/- per square feet. Visit some of these traders and acquaint with yourself about the quality, variety and prices. Do not accompany your mason, contractor & manager, when you visit these traders. The moment you visit the show room,with them, naturally the price goes up by10%.
The prices have come down by about 20% to 40%. Do not go in for sweet talk. You will be taken for a ride. Kanakapura multi colour is supposed to a good variety. The price may be between Rs90/- to Rs150/-. Wish you all the best.
Best of Luck.