Engineered stone is a composite material made of crushed stone bound together by an adhesive, (most commonly polymer resin, with some newer versions using cement mix).The two common stones used in producing these products are marble and quartz.
Although some quartz countertops are actually made of quarried slabs of the natural stone, the new engineered material is actually created through a manufacturing process that mixes approximately 95 percent ground natural quartz with 5 percent polymer resins.
Pros and Cons of Quartz Countertops. Quartz countertops are relatively new, but they've found a loyal following because of their many good qualities such as their attractive appearance, durability and the fact they don't have some of the weaknesses of natural stone.
Natural Quartz Quartz is one of the hardest minerals found in nature, so it's a fitting material for the busiest space in the home: the kitchen. Quartz countertops are made from crushed pure natural quartz combined with a small amount of pigment and resin.