I cut a good sized pecan last spring. I put the top half of the log in my woods all summer in an effort to get it to spalt. Spalting occurs when bacteria attacks the wood. It can change the wood from plain to strikingly beautiful. Or, if left too long, it can go too far and the wood ends up too soft to use. It’s half timing and half luck. I opened up this log yesterday and the spalting is just getting started at the base. I think it was way too dry this summer to get good spalt. You need heat and moisture for it to work. I hauled it back to the woods and will try it again next summer.