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.

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?

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!

Just bought a car with these hanging from the rear view and I’m wondering what they are?

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!

I was one of those kids with pockets so full of rocks that I had to wear a belt every day to keep my pants from falling down. I had a pretty sizable collection for several years, but sadly, most of them have been rehomed or returned to nature. The ones pictured are some that I still have and are a few of my favorites.

I would love to give a geographical location, but I can't remember exactly where I picked them up. We moved around a lot, but we lived primarily in central and eastern Washington, southeastern Idaho, and northern and southern Arizona. We also spent some time on the Oregon coast and I remember gathering lots of rocks there. Hopefully those places will help you narrow down what they are, but I understand if it's just too large an area to narrow anything down.

For each rock, there are pictures of them dry and wet and for #2-#4, I have pictures of them in front of a light. I don't have a flashlight, but I figured the desk lamp would work alright. No light shone through for #1, so that picture isn't included. Also for #1, the water didn't seem to sit on its surface in the same way that it did for the others. You might be able to tell from the pictures.

I tried scratching all of them with a safety pin. Nothing happened with #1. #3 and #4 both had small indents, but only after pressing hard. #2 was by far the easiest and seemed to crumble a bit when scratched.

I tried to use them to scratch glass and both #1 and #4 were able to make any marks.

Thanks for helping me figure out what these are! Let me know if you need/want any additional information.

It’s about the size of a football and very heavy. The white parts sparkle in bright light. Found in Northern California. Thank you:)

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!!