Inside the showroom at Amsum & Ash, a natural stone wholesaler in Fridley, there is granite in just about every pattern imaginable.

And if you've built, or rebuilt, or just stood inside a kitchen lately, you don't need Zach Hallberg to tell you how popular granite countertops have become.

"For the most part, it's the aesthetic of the granite that sells it," he said.

But in the past week, Hallberg, who is the company's chief operations officer, said he's been fielding a few phone calls from customers who have concerns about the stylish and durable rock.

"It hasn't been an enormous volume of calls," he said. "An average of 4-5 homeowners a day or so."