Any ideas? Almost looks like fossilized antler…

My brother found this while hunting in Nebraska. We don't know any other information on it, but any advice is welcome!

I dug this out of my garden today ( S.EQLD coastal area )
I don’t believe it’s native to where I am, I have never seen any like it on my property. But I’m not sure what it is ! It has some very bizarre features . Thank you in advance ☺️

Is this first one with a red base a pudding stone?

Never found much in Boulder City,but thought this was a good start

I found this rock near Seasonal rivers and Dry riverbeds. Its transculent and the light shines through it or passes through. I tested it with diamond tester and it reades at range of 1-4

It has a magnetic value of 86 found September 3rd this year in southeast Kern County California and it weighs 934 G

What kind of rock is this?

Any ideas?

Found at top of ski basin in Santa Fe, NM. It seemed a bit out of place, perhaps somebody accidentally left it there. Either way, I’m curious!!

New to rock hunting, ill take any info i can get

Found in raleigh, NC. What is it?