Whats the difference between Quartz, Marble & Granite?

Marble and granite are natural materials quarried from rock. They are mostly porous materials, which stain easily and are perfect breeding grounds for bacteria.Marble, as it is softer than Quartz, is at risk of chipping and cracking and requires periodic sealing and other maintenance, whereas Quartz is virtually maintenance free. Quartz and Granite are heat resistant and will not get damaged when pots are placed on their surfaces.