I found several of these stones where I found my points it's in karnes county it's nothin but caliche can anybody tell me anything about this it weighs bout 75 pounds the largest one.
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I'd say it was agatized petrified wood. Nice stuff too. It'd make somebody doing lapidary work real happy, and it'd make some real nice points too. The right combination of minerals and it could be opalized.

My guess is petrified wood replaced by Chaldony. Otherwise no clue. Nice chunk ! Hal is the geologist and will soon comment. Hal?

Alot of the points I find are made from this

Your county has lots of petrified Palm wood although yours does not appear to be Palm. Sill thinking petrified wood but what mineral it was replaced with is unknown to me. Call Hal. He knows every rock in the state. In person ! Hal?

Ken you are right on the money. Hal is sleeping so your opinion is right on track. I like petrified wood points but have never found one.

I found that one 4" blade out of palm and a couple of others out of wood, those though were of much lower quality. The pieces of palm that I've found were generally small but of high quality. The other wood was fractured and had a lot of inclusions.

i live in east tx and petrified wood is as common as pine trees, thats a very nice large piece, i have a few gary points made of it