Help identifying a large rock

[DWood]

While wading a river in the cascade range I found what I thought was a large piece or stump of petrified wood but after digging it out of an undercut back, rolling it across the river and getting a buddy to help pack it to my pickup and bring it home I’m doubting it is but I really want to know what it is. Weighs about 350# and 3’ in diameter, I see lots of quartz I believe so I cut a chunk out of it of which I will post a photo. Help, this is driving me crazy!

 

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[A2coins]

Thats alot of work to haul that bad boy home. Looks like quartz but I am no expert at all hope its something good.

 

[DWood]

It was a lot of work! And thanks, I hope so also✌��

 

[ticndig]

I'm no rock expert but I do know hard work when I see it .
time for a cold beer and some icy hot.. I hope it was worth the effort .

 

[HuntinDog]

Man my back hurts just looking at the pictures....

I'm going with quarts.
I don't see any grain to it.
But I don't know rocks

 

[invent4hir]

The first picture looks like flint with all the edges - but the rest I'm not sure of.

 

[ANTIQUARIAN]

Welcome to Tnet from Toronto DWood.

You might want to consider posting your question here as well... Rocks/Gems

Dave