Thank you for your informative expertise also,The crystallization in the bone is really a pretty amber color and some parts shine a mother of pearl glimmerI'm not seeing anything vertebral, but I can see sutures typical for the shell of a marine cephalopod. Those 'frilly' and curly patterns which represent the segmentation of the shell, shown enlarged from one of your pictures below. I think you probably have a crushed ammonite in there, along with some other marine detritus.
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