Demosthine: You might want to check out the article that Mother Earth News did awhile ago, where they tested various methods of preservation. They didn't use mineral oil, although I would suspect that lard would have similar properties when it comes to preservation. The end result is that the coated eggs lasted about six months, but the refrigerated eggs were still almost as good as fresh when the experiment ended, which they credited to the bloom still being on the egg. This matches pretty well with my own experience. I don't think that refrigeration by itself would mess with the bloom, but I can see where people would come to that conclusion, since a a lot of eggs do get washed before they hit the fridge. Personally, I stick my eggs in the fridge, especially in the summer, since my house is usually around 85 degrees, which is comfortable for me, but a good fifteen degrees higher than most sources suggest storing eggs unrefrigerated long term.
AZBootsie: It looks like Eucalyptus to me.
I put mine in the fridge also. Don't want any chicks hatching on the counter!!
I thought it was when we dug it up. But, it doesn't smell like Eucalyptus.