✅ SOLVED Looks like terracotta .. Heavy like quartz .. and very hard .. What is it?

[creskol]

Found this while walking the fields in Texas after the hard rains earlier this year washed it out.
It is very hard and heavy, and I am a bit baffled by the "polishing" on the sides and bottom. I thought terracotta, or brick at first, but its characteristics lead me to question that.
Any thoughts?

I also found the arrowhead in the same field. I posted it on The North American Indian Artifacts board hoping for an ID, but have not gotten one, so if you have any thoughts on it as well, I would love to hear them.

 

[bigfoot1]

looks like a jasper.jasper often used by natives for knapping tools and polishing.my best guess

......

 

[1320]

Your arrowhead might be one of these.....

Baker Projectile Point

Big Sandy Contracting / Auricle Base Projectile Point

 

[Back-of-the-boat]

Could be red obsidian.