What is the difference between granite and marble, and which should i choose?

Although both granite and marble are earth born stones, they are not completely equal. Granite is developed under high temperatures deep in the earth making it a very hard, resistant stone--the 2nd hardest stone, in fact. Marble is formed at the bottom of bodies of water, solidifying over millions of years. Marble is made up mostly of calcium, therefore it can be affected/damaged by exposure to acids such as vinegar. Because of the differences in the stones you may consider granite to be more economical a choice in the kitchen; however both stones are very durable when maintained and cared for properly