Help identifying type of geode

[Thesimp]

Can anyone help me identify this geode? Found in the DFW area

 

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[PennyG]

That might be a druzy stone.

 

[IAMZIM]

The crystal structure looks alot like dog-toothed calcite. The whole "geode" reminds me of a septurian nodule, like what comes out of Utah. Not sure where DFW is. Hopefully someone with more knowledge can verify. Cool rock though!

 

[Mackaydon]

IAMZIM
DFW=Dallas Ft. Worth, TX.
Thesimp: Welcome to Treasurenet !!
Don.......

 

[stdenis_jd]

I agree with Zim, I was thinking thunderegg type but not in the DFW area - dogtooth calcite crystals more than likely, smaller crystallized calcite in the seams. The solid gray/blue areas are either chert or jasper