Please Identify

[Kristat2]

Any help identifying this would be much appreciated can’t remember exactly where I found it had it for a while but Found it here in San Antonio

[Misha]

Chert nodule maybe?

[Kristat2]

32 minutes ago, Misha said:

Chert nodule

Awesome thank you for your help

[tombk]

I was also thinking chert with a lot of cool twists and textures. 

[JohnJ]

I agree it is a chert nodule.  I'm also fairly certain it contains a caprinid rudist as evidenced by the linear stranded area and the chambered section.