Quartz is the most abundant mineral on the earth's surface. Because of its strength and reliability, quartz is a popular choice for countertops. Though quartz surfaces are often referred to as "engineered" or "man made", they are in fact primarily made of natural stone. Quartz is engineered for resilience and durability in many different colors and patterns ranging from very simple white finishes to highly "veined" surfaces resembling natural marble. Because of its extreme durability, quartz doesn't need to be sealed periodically like granite or marble. Because of its non-porous nature, quartz is also more resistant to staining.