In terms of lifespan, granite will typically outlast marble since it's harder and more durable, and marble is considered the softer stone in comparison. Unlike granite, marble is not heat resistant and can etch easily, especially outdoors or in the kitchen.

The formation of granite occurs when magma crystallizes slowly below the Earth's surface. Granite is composed of mainly natural quartz and feldspar with traces of amphiboles, mica, and other organic minerals. At their earliest stages, your granite countertops were just molten magma.