Whoever coined the phrase "hard as a rock" might very well have been thinking of granite. Formed over millions of years from compressed molten rock under the Earth's surface, granite is extremely hard and durable.
With its heat-resistant qualities, granite doesn't blister; it's also unlikely to scratch or chip. When used for kitchen countertops, it's far superior to marble, synthetic and laminate. It's also better-looking and has a luminous, dimensional quality when polished.
Granite is made up of interlocking mineral crystals, the most common being feldspar and quartz. But an array of other minerals can be included, and these make each piece of granite unique. Feldspar is the white mineral you see in granite; the light gray veins are quartz; and the black is typically mica