Quartz is made up of natural crushed quartz with resin and polymers and has 4X the flexural strength of granite, making it less susceptible to chipping and cracking. The engineered stone is non-porous and does not require any sealing — ever!!!
There are many manufactures of Quartz and they’re all pretty close in their strength, durability and performance. Here are some of the manufacturers you might be familiar with and links to their colors:
Viatera, Vicostone, Cambria Quartz, Corian Quartz (formerly known as Zodiaq)