Hartstone Baking Stone "made of natural clay materials, oven, microwave, dishwasher and freezer-safe. stick resistant, no seasoning required." I had not yet found your forum when I purchased it. The stone info does not state a temperature cap and I'm pretty sure the stones your members use are NOT dishwasher safe. Anyway, the first time I used it was in the oven with a disastrous launch so made a mess right off the bat and shelved it. Got her out yesterday and tried it on the gas grill. The grill smoked like crazy getting to 500 and my taking too long to prep, it was already black when I opened the grill. Pie was a bust and this is what the stone looks like today. Comments appreciated. Thanks in advance.