Large tube with crystals

[Lbarton769]

Found this while digging on my ranch in Commanche County Texas. It was 9 feet deep, I was digging cleche for my roads. It’s a large tube, the ends are hollow with crystals in it. Any thoughts? Was told it’s a calcified worm burrow several million years old.

 

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[ToddsPoint]

I like the rock but I like your tractor even better. It looks brand new!

 

[newnan man]

Fulgurite maybe. Pretty big for one though.