A reader writes in,

“… I have been doing countless web searches in hopes to find someone in IL
who can help me out with a rather interesting find (and it looks like I
might have found the right people).While I was vacationing down in
Northern Florida (around the Jacksonville Area), I came across an large
interesting rock washed up on the shore….

I searched online and I couldn’t find anything that matched its
size nor its weight (around 30lbs). It has various ‘leaf’ looking
things inside it as well as a few different colorations varying from
the orange to a greenish blue color. All in all, it is absolutely
amazing looking for whatever it is….

I was hoping either someone in ESCONI could help me out or at
least point me in the direction of someone who might be able to tell me what exactly this rock is. I would love to know just for my sake and also to learn how to best preserve this beautiful piece of whatever it is…”

The reader, B.N. who gave permission to print her letter and photograph, has been invited to bring her find to an because that is the best way to get an informed identification.

But this time, I thought the photograph and her description was good enough to make it possible to make a plausible guess…

Can you help out this reader/rockhound? What do you think it is?