Over the past decade, engineered stone countertops made from crushed quartz have taken over the U.S. market. They come in a range of colors and patterns, and manufacturers talk up their advantages.

Some workers are sick — some even died — after cutting stone countertops for kitchens and bathrooms. The material is cut to order in thousands of shops that may not understand the dangers. Some ...

The Cambria factory in Minnesota manufactures slabs of engineered quartz for kitchen and bathroom countertops. If businesses don't follow worker protection rules, cutting these slabs to fit customers' ...