In most cases, no. Most bench scrapers (aka dough scrapers) are made from hard materials like metal and will scratch the relatively soft surface of quartz. This holds true even if the scraper is not particularly sharp. And after quartz is scratched, it’s nearly impossible to get it to look pristine again. That being said, there are some scrapers made from softer materials like soft plastic or silicone that are okay to use on quartz. I’d recommend not taking the risk, though, and just cutting or scraping your pastry dough (or other soft ingredient) on a cutting board.