Since it didn't crack already from the direct flame/heat, I would think there may be a chance it'll happen in the future. I'd say keep using it and see what happens. You could try a baking soda and water paste to try to clean more of the dark parts. There's a chance that it got a hairline crack that you won't see. I know that's happened to people and eventually it does crack, but maybe it won't. Good luck! That's a bummer!

 

Stone on top of stove top

I was baking cookies on mine and when I got through put the stoneware on top of the stove. Turn my back and my husband turned on the stove I then heard a loud crack and it broke. Had to throw it away.
You can guess by know my husband was in the dog house for awhile.

 

i had cooked something on my pizza stone(before i started selling pc) and sat down to eat and i heard this loud crack that scared the mess out of me and mine broke. it's likely that it will probably break later on, but until then cook on it!

 

Must be going around...LOL My husband wanted to cook bacon, he pulled out the double burner griddle, put it on the stove top, turned the burners on, walked away for about 3 minutes....unfortunately, he turned the wrong burners on and my rectangle stone was sitting on top of the other burners. In the short amount of time, my stone, not only broke in 3 pieces, it also caught on fire. It was very seasoned. Once the stone broke it opened up the burner to all that seasoning. It was a disaster. So, now I have a new rectangle stone to season.

 

My hubby did the same thing with my medium bar pan, I was so angry!

Laurel- I would just clean the stone and use it until it breaks, if it does...

 

I did the same thing myself with the plate- Luckily the plate was same size as burner so heat was distributed evenly