Both are stones and both are quarried from the earth, granite and marble (limestone, onyx and travertine – marble’s relatives) are very different from each other.
The marble family, travertine, limestone, onyx, marble, starts out as sediment, shells, plant matter, animal skeletons and silt at the bottom of bodies of water. After millions of years, this solidifies into stone. Because its main component is calcium, it can be affected by acids such as citrus beverages and vinegar.
Granite is formed deep in the earth’s mantle at extremely high temperatures, pressure and is a very hard, resistant stone made of crystallized minerals.