Some of the more popular brands include: Silestone, Caesarstone, Zodiaq, Cambria. Difference between brands is minimal as the formulation is virtually the same for all of them: a combination of natural quartz (approximately 93%) and epoxy resin binders and colours (approximately 7%). Some brands offer different textures and additives to their formulation, but for the most part this is for marketing advantage. With quartz, the consumer can comfortably focus on colour rather than brand when selecting quartz.
Quartz surfacing, or “engineered stone” as it is sometimes known, has the appearance and hardness of stone but due to the resins doesn't require sealing. Another benefit is the consistency of the product. Each sheet of material will have the exact same proportions of colouration which avoids the sometimes undesirable randomness of stone. No threat of a natural mineral discolouration in the middle of your island with a quartz countertop! When it comes to cleaning quartz, most brands simply require a mild, non-abrasive cleaner. Exact cleaning instructions will depend on the specific brand you select.
Overall, expect to pay about $70-$125 per square foot. As with all premium counter surface materials, be sure to get your specific layout priced rather than going by a “lineal foot” price.