Looked really interesting, so wanted to learn more about it. It is completely opaque when held to a light.

I tried to test hardness and I think that I not only scratched it with stainless steel but also put a small fracture. In the last pic, the arrow is where I scratched and the fracture is underlined.

Just found in a rock pile in our driveway so I don't know exactly where it came from but I assume most likely somewhere in Marquette county. It scratches glass, feels pretty dense and heavy but seems like there's tiny air pockets throughout. Mainly wondering about the shiny green part but also curious about the red bits

Apologies if this is not allowed but this stone has stumped me and several other jewelry lovers. It’s a matte black but it has some flash. Please help- what stone is this?

Why does this slate(?) Seem to be layered at such an angle

And also does it rust bc theres copper in it?

found in SW wisconsin, if you squeezed it it would crumble, found multiple deposits in a river

Rock has been there for many years untouched, mybe 25-30 years. Can i move it? Should i use gloves? Am i already cooked cuz i slept by it for a month?

Found among school yard gravel by my son who's very interested in rocks and minerals.

Can anyone tell me what this is?

First pics wet and the last 2 dry.

*Edit: Seems to be a consensus it is an LSA! Dream come true! Thanks to all that commented and if anyone has more to add, feel free!

I’m a causal learner of Geology. My guess is that this is Santa Monica Slate with igneous magma intrusions (plutonism?).

Is it possible that’s its petrified wood? Looks kind of similar to some of the petrified wood I’ve found down in southern Utah. Also what’s the blue colored stuff? Blue lace agate possibly?

Found in a historical pegmatite district.
On fully unclaimed land verified and all…
We cannot find the dike as the hillside is completely weathered but anyway….

We also opened up a visible dyke about a half mile away that revealed dark red/ brown gemmy elbaite… on our new claim. Tho this one is much much better obviously

Found along the wissahickon creek in southeastern Pennsylvania. This is a specimen of mica schist containing garnets and an unknown black mineral. Any help on identification is greatly appreciated!

Hello, I bought this in Kentucky and was told it was from Allen County, Kentucky. It was labeled as agate. I included a second specimen purchased from the same vendor from the same location that more clearly appears to be agate. I am no expert though and would love to get your opinion. For clarification, the first 3 photos are of the 1st piece, the last photo is for comparison. Thank you so much for your help!

Found on the beach in South Jersey

Hi!
My dad was gifted his old rock collection from when he lived in Australia in the 60s/70s. I suspect it’s some kind of quartz but I’ve never seen it this yellow / dark yellow colour? I find it hard to believe it could be citrine too. It’s quite dense and not very crumbly.
thanks!!

I found this very smooth stone on a beach in Del Mar, CA (north of San Diego). I’m wondering what is it is.

Found while fishing at lake Seminole

Found what I believe to be Jasper but I’d like to know if this particular Jasper had a name? I don’t have dry picture because this was after I polished it 😅

Hello Reddit I found these on the coast of California today! I am wondering what they are/if they are anything special? if so would it be worth polishing?