Here is a picture of the countertop with the stain.

Here you go:

Here is a link that might be useful: Blue-be-gone

Hi. I have the same problem. Turned the vase upside down to dry and I got a fume stain. Were you able to solve this ?

Thank you

I'm going to guess this has more to do with whatever coating/glaze/wax is on the granite rather than the stone itself. The above link just goes to the front page of the Slippery Rock Gazette so who knows what article they were trying to point to.

Updated link.

"I'm going to guess this has more to do with whatever coating/glaze/wax is on the granite rather than the stone itself."

I'm guessing you're wrong. Natural stone is susceptible to powerful chemicals such as hydrochloric acid as found in toilet bowl cleaners and cyanurate fumes.

I had this same problem. After searching around I tried a paste of bicarbonate of soda and vodka, rubbing hard for a couple of minutes and this polished up the counter and made the darker circle (on black granite ) go away. Looks good but I’m going to use granite sealer to maintain it. Don’t know if that would have worked by itself. Don’t recommend any acid or blue-be-gone based on my research!

No guarantees, but you might try rubbing it with car wax or polish. If that doesn't take it off, try rubbing compound (it's a much coarser abrasive), then apply the wax or polish. This works for many stains and marks on many different hard surfaces.