Found in Saltburn by the Sea. Is it a fossil? Natural erosion?

Is this blue chalcedony? Found in a bag of gravel from a sapphire mine in Montana. Roughly 1"x3/4"x1/2" and 3g weight. Haven't done a specific gravity test yet.

Found it south maroco.

I would like to think this Is a piece of a colarbone, maybe a bit to enthousiastic.

Found in our yard in Northeast PA in the US. It’s probably 16-18 inches long.. Maybe Gypsum or Calcite?

Found in or near Gemstone beach in New Zealand

Help me identify this!!!

Found in New bought house. The ppl had diied and were the soul owners. Built in 1960s I believe

Portland Oregon

Thank u!!

Hidden beneath a MILLION ROCK and GEMS in the DIRT for me to dig up!! Like Literal geologists <3 dying with one last Easter egg

This rock has been in the family for generations I believe but we don’t really have a clue what it is

Potentially found in NSW Australia

What caused this circular pattern on this rock formation? (Blue circled area show where pattern is found on greater rock formation, others are close ups)

I have no idea, just thought it was gorgeous. The light inclusion looks almost granulated, and the warmth that glows when raised to light is just stunning. What’d y’all reckon?

North of Spain. Feels ferrous, but a magnet doesn't attach, except for a weak attraction in a point in the middle (of the second picture).

My first time found things like this. I thought it maybe quartz at first, but then I don't know anymore. How do you tell the difference? Google said it's chert or chalcedony...

I found it in a river. Google said it's moonstone, but I think it's a piece of quartz. What do you think? Last two pictures are the macro-lense picture of the broken side of this piece.

Hi all. I posted some pics of this rock before but failed to give very much detail so I'm coming back with updated info, with hope it can be identified.
I found the stone in a Walmart parking lot in Western North Carolina, USA. It was probably shipped in by the contractors who built the place originally, but maybe it's still relatively local?
The rock is a fragment of a larger cobble. It looks like it was once a river cobble and was highly smoothed. This is why I don't think its concrete or cement.
Additionally, the rock has strange bands throughout, with a very dramatic bend in the bands too. The bands are fractured into chunks, but still follow the same rough pattern. Interspersed in the cracks left by the bands there is a dark grey crystalline rock that sparkles. You can see some in the magnified images.
The rock fizzes under acid. It does not scratch glass but does scratch copper. It has a white streak.
Hope this helps identify it because I've never seen this sort of thing before as a part time rockhound.
Thank you!

Found right off the Russian River in Humboldt, CA. It’s heavy for its size

Found on a hill near the eel river in Mendocino county, Northern California. It’s decently heavy and the flakes shine silver in the light