Quartz is growing in popularity! Quartz is man-made and the top tier quartz products are Caesarstone, Cambria and Silestone. Quartz countertops were first brought out by Caesarstone. These three companies have 93% quartz and 7% resin in their make-up. The resin is what binds the quartz together and help to keep the even color throughout the slabs. Their are many different quartz brands and most other brands have less quartz and more resin. You have to do your homework on the different brands out there just like you do with any appliance or TV set. Quartz alone is almost impervious to scratching and heat, but the resin, which is like a glue, is not. I have worked with quartz for over 8 years now and I can honestly say that I will be using quartz in my next home in both the bathrooms and kitchen. Quartz does not need to be sealed and is great for people with food allergies, such as milk or peanut, because of the ease with which you can clean up spills. You do need to be aware that you should use cutting boards or the quartz will dull your knife. I would never put a pan from the oven or stove directly onto a quartz countertop. Anything from the microwave will be fine. Quartz is hard to stain, red wine, lemon juice, even hair dye does not stain quartz. You have to have something highly acidic to stain the surface. Even nail polish is easily removed with a quick cleaning of nail polish remover followed by a wet paper towel. I would also recommend using a dish towel under a crock pot if you use one as the radiant heat might cause a chemical reaction. Again, this is only due to the resin.
I have had someone tell me one that they had seen a slab of granite and a slab of quartz fall over on a dock at the same time and the granite broke into a million pieces and the quartz was hardly damaged.
I hope this helps and I am sorry for the long post.
Q