Review on White Carrara Marble Coasters Drinks by Reid Rickerson

Bought as a present for my daughter in law. Thought they would look good (and be functional) as part of their "coffee bar". They arrived within 24 hours and were well packaged. They are a very nice weight and my sister in law liked the raised lip. I think I was just a little confused by the "Generic" brand. The coasters were not marked in any way which somehow gave them a cheap look although they weren't cheap! There was nothing in the box either; that was also common. It's just a little weird not knowing anything about the product you bought other than what it says on the Revain website. But do they look like they are made of marble?