Potato Diamond or Horse Hoof Crystal?

[MilesSupertramp]

Most of you rock people are way smarter than me, geologically speaking. So, I ask you: what is this rock I unearthed which looks like a hoof/half of a potato with an interior of a large diamond or white transparent crystalline structure? My ignorant wild guess is that it's a petrified potato. What do you guys/gals think?

 

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[Brian T. Booth]

Bottom piece looks to be a cracked open geode. The top piece looks to be a broken piece of milky quartz

 

[Eu_citzen]

I agree with Brian.

 

[MilesSupertramp]

Woohoo! I'm rich!! Thanks Brian and Eu!

 

[hvacker]

You sure got knack for naming stuff. I thought you had found something I never heard of.
But with 3500 or more minerals I guess finding a new one is just around the corner.
Agree with Brian.