there's a ring like on my quartzite. We don't know how it got there or what we could have possibly left there to cause this ring. I thought it was etching, but it's not. It is smooth to the touch. It's hard to capture in a pic, but in the picture that I'm attaching, the ring is in between the ight refections. I read somewhere to use acetone. Is acetone safe to use?. Does anyone know what might have caused this ring? The quartzite is sealed and it definitely not any condensation mark because we have left a glass or 2 on the counter and this has not happened anywhere else on the stone. Has thus happened to anyone else? Is there a real remedy? As always, thank you for your thoughts and suggestions.