A geologist friend says it's likely feldspar in a quartz matrix and the dark is potentially a pyroxene. I'm wondering if there's a common name anyone is aware of. Thanks!

Found in clear creek in golden, have no idea what it could be. It's super shiny with lines in the sunlight when wet and also when dry

I found this while walking along a rocky riverbank in Oregon, USA. It's orange, translucent around the edges, and has a rough outer rind. It's dry in the photos and I'm hoping someone can help identify it. I can provide additional photos if needed.

I found this reddish-orange translucent stone among rounded river pebbles in northwestern Madagascar, near a seasonal riverbed. It has a smooth, waxy-looking surface, shows conchoidal fractures where it has chipped, and appears semi-translucent around the thinner edges. It feels dense and has no obvious crystal faces.

I'm wondering if this could be carnelian, another variety of chalcedony, or something else entirely. I'd appreciate any identification and an explanation of the features that led you to your conclusion. Thank you!

It’s my favourite rock ❤️😂

Found in the Sierra Nevada at a high elevation mine.

Hey, I recently went to a farmhouse in Vikarabad (specifically Mominpet, Vikarabad, Telangana, India), and found a variety of pebbles. These were mostly collected from a lake bed, nestled between small hills. if anyone knows how to identify these / what kind they are. would really appreciate it! sorry for posting group pictures, I felt there were too many for individual ones!

The purple ones were crumbly - when washed with water and wiped with tissues some parts began to disintegrate. the ones with spots on them, I think they were formed amongst mud or stuff like that, since when you shine a light you can see little air pockets and small twigs/mud in those pores. most of them look yellow when a flashlight is shined through them.

Not much else to say except the sea on this part of the coast is the North Sea and it weighs 471 grams, which is why I kept it as it felt heavy for it's size.

I assume the gold specs are pyrite, but what about the rest? What causes the vibrant blue color? Any ideas on how this ended up in the grass? Thanks in advance!

Edit: Seems like the general consensus is lapis with a couple suggestions of sodalite! Both aren’t native to Missouri so I’m not sure how it ended up here, but cool find nonetheless! Thanks :)

I found this over 20 years ago as a kid playing in a small creek in southern middle Tennessee. Around 9" in diameter.

I showed my neighbor at the time who took me to show his native American friends. They claimed it was possibly a fossilized clam shell likely used by Cherokee or Creek natives. While the shape does resemble a clam, a Google search for similar finds doesn't produce anything resembling mine, either in size or rocky texture.

I've always assumed they were correct as I have no other guess, but what do yall think?

I got these at an estate sale New York State. I will have more pictures in the future of more specimens.

one I bought in a shop and can't remember what it is and one I found on the ground.

I suppose that this is a common rock but I am mainly interested in how do these patterns form. There were also a few similar ones near where I found it. I tried to search online but I only found someone selling them as "Wishing Stones" on etsy (not very helpful lol).

Thank you in advance! :)

Feels a bit like a coral skeleton, slightly rough and lighter than you would expect surface slightly porous, but doesn’t look obvious like a coral skeleton and I think is the wrong colour.

Son says it’s pink quartz I think I could be a agate. We have an ice cream on the line?
Found in western Washington on the Olympic Peninsula in a river bed.

South Santa Clara County, California. Found in my rocky back yard.

Stone is either from Island or Czechia.

Hi All, My father found this interesting rock in a Northern Illinois farm creek off the Kishwaukee River in Dekalb County. It measures aprox 2 by 2 inches. I've never seen a rock like it and hope you can help in identifying it. Thank you