Aha! A 'tadpole' search produced a couple of threads about nucleated freshwater and an attempt at explaining what's up - nucleating under the mantle.
Why didn't I think of it?
It must have been the claim that this is saltwater (which can still be, for what that matters and what I can tell), the SIZE and the very exaggerated tadpole profile just made it look different to me.
'Guess that if hasty nucleation could produce that shape in freshwater pearls, nothing says it couldn't in any other shell. Why not. SS pearl attempts are all over the place, not all high tech or anything.
Crazy pearl that! Almost wanted to get some quick idea of what could be done with it and the like
Too bad Halley just went by recently
