What are the cost differences of stone that come from other regions around the world?

Generally they are cost comparable. Granite prices can differ for a variety of reasons. Typically, prices fluctuate depending on the rarity of the stone and difficulty to obtain. Pricier, more exotic stones usually come from India, Brazil, and Italy. Stone costs can also differ depend upon quarrying and processing costs, availability, shipping and importing, complexity of fabrication, and supply and demand.