So made a starry night last night with an opal inside. Garaged at 900, annealed at 1130ish for 2 hours then left to cool over night. Everything else made in that lot is fine.
This one however.
Before...
5 mins later it had the big top crack about ten mins after that a second one appeared....
And nope I didnt drop it didnt even set it down hard or anything like that....
