This is most likely from a beach in northeast IL, BUT it could be from somewhere in Europe (Spain, Germany, or London).

First 2 pics are dry, the rest are wet. This is after stg 1 in my tumbler.

Pls be nice if my ID is totally wrong, I'm new at this!

As title says, found this rock in the NE Platte River in central Nebraska while stopping to let my dogs run around on a long road trip. Need help identifying. This rock is more dull when dried off. Any info is appreciated. P.S. Sorry for the dirty nails from combing for rocks!

Tried to photograph the strange green clusters that remind me of porphyry. Small, tight, Starburst structures. Any ideas?

Purchased at a mineral show. What is it?

From my mother’s jewelry, a mid century ring with a stone that changes color. Not bright, more dusky. Usually looks like an amethyst but under fluorescence it’s really green. Shown in mixed light, directly under LED lamp and then after lamp was turned off. No idea where she got it but she collected a number of pieces in the 1960s when we lived in Florida. Plus she and my father made jewelry and he had a faceting machine. Don’t know if they made this or not. Ideas? Thanks.

Hello and apologies in advance for possibly posting this in the wrong place and/or alarming anyone. My bf always picks small rocks and shells for me when he’s traveling and brought this strange item back from a recent trip near Point Judith, Rhode Island. I was rinsing it off with two other rocks when I started to notice it had a different weight + texture to it and sounded different against the metal of the sink. The more I rinsed, the more it resembled….teeth. This has completely freaked me out, as it does not look like any animal teeth I’ve been able to cross-reference. 😰 Would so appreciate any opinions on what is going on here. (Item is hard and seems calcified, fyi) Thank you!

Cornwall, Uk

This is my dad's, found near a railroad track in central Pennsylvania in the late 60s/early 70s. The brown spots are pretty dull and smooth with slightly sparkly more textured inclusions. There are small areas that appear greenish, but it's possible it got scuffed over the years.

The outside has a very "organic" looking pattern. Almost looks like a fossilized plant or something.

I assumed these blue crystal’s were quartz but I’ve never seen quartz with this growth pattern. There was no effect when I submerged the rock in muriatic acid and I’m unable to scratch the crystals with a knife.

https://youtu.be/9476ZNXbOLs?si=6ne0BIXvr28_js1y

I found this in a riverbed in central southern BC, Canada. I believe the sparkle is from mica, as it is very prominent in this area. Agate, opal, and quartz all occur naturally in this area.

This rock was just sitting in the grass in the courtyard of my apartment complex. It feels like it’s been tumbled or something. It’s so smooth and the edges are curvy

I found these in a creek in upstate New York.

At first they appear to be sapphire . Once you crack it open it appears like quartz. Like quartz with a blue skin.

Does anyone know this mineral ?

I found this guy in the Rock River near South Newfane, VT. It caught my eye because it looks to be covered in garnets, but I’m not sure of what else. Rock is about the size of my fist and was photographed dry.

Bought this one over 20 years ago in Jerome AZ. Don't think it was native to the area. Can't remember what it is. Need help.

Found in Castroville Texas while excavating, what is this? There’s two more in the similar log shape.

Bright intense dark orange bubbles. What is that?

USA west

Any ideas? My first thought was some sort of slag? Feels like glass and has a green color that can be seen in some of the photos.

It was found on the Black Sea beach, near Constanța Romania.

It's easy to file, harder than coal...

Hi all,

My BF found this "rock" is a dried up river bed in southwest virginia (right near the north cafolina border)

Im convinced its glass or some slag from an old factory nearby but he thinks its quartz or something similar.

Any ideas?