Rummage around on here please. Tons of threads.

I would not install quartz behind my range.

What @Joseph Corlett, LLC said. This topic comes up seemingly, every other day. Give your fingers some exercise, Google.

Quartz is not an appropriate material to use behind a cooking surface.

Seems like millions use it.

"Seems like millions use it."

Then why ask?

I personally love the use of it as a backsplash (in my new build I’m extending the counters up the wall), however my kitchen designer recommended doing a riser behind the range to protect the quartz. The good thing is the back burners aren’t the big burners and likely you’ll only be warming in the back, and the hot temperature cooking will be done in the front. But we are doing a 5” riser like this just in case.

Check the installation instructions for the range. That will tell you the clearances to combustible surfaces. My range requires a back guard or minimum of 6 inches from combustible surfaces.

For your reading pleasure

https://www.houzz.com/discussions/5539959/miele-gas-range-self-clean-issue-with-dupont-zodiac-quartz-backsplash

Thanks to all. The range is not a high powered one; just an ordinary LG slide in. Thinking now of Dekton BS; it sounds heat resistant.

You have to follow the appliance manufacturer's instructions. Putting a noncombustible surface like Dekton on a wall does not turn a combustible wall into a noncombustible wall according to the NFPA.