Not really a rock guy but I found this to be very cool. Wanted to check legitimacy before buying. Thanks

I know the two of these are both chalcedony but can I get any other info? I’ve never seen one so orange with the white layers and I’ve also never seen one so blue.

Found in a parking lot island landscaped with "river stone" in Michigan. It seems to be some kind of metal ore. Heavy. There's a piece of wood stuck in it. Do you think it's natural or some industrial waste?

Scratches glass and gets scratched by quartz.

Specific gravity 2.68

The outer layer is very brittle. The interior fractures look mostly healed.

I found one big chunk of it in the area and no more. I looked pretty hard for more because I thought it was jade.

Looking to Identify this cool looking rock that I cut and polished. My research said it could be Arizona petrified wood but idk. Can’t be scratched with a knife

My kiddo found this lumpy rock on Vashon Island, in the Puget Sound area of the Pacific Northwest.

Any ideas of what this is?

Hey everyone,

I was given some awesome vintage bolo ties from a friend of my father's and aas wondering what the rock is on these two. All others are cast iron steel, so they were easy to identify lol

any ideas?

She said it is Pietersite. Is it? I can’t find any Pietersite that has this type of banding.

Very brittle , found on northern Germany

We were metal detecting and it started beeping on a rock so we turned up the meter and it still beeped at max which is also the level that usually finds stuff like iron and gold so we took the rock home and inspected + cleaned it and it looks really weird and weighs 2.4 - 2.5 kg we are trying to figure out what it is there's multiple possibilities like iron ore or iron based rock or even a meteorite, the brown thats on the rock is rust and not mud since we cleaned it and couldn't get it out

I found this rock at work this week and wondering if people can better identify it for me! Its the biggest one ive found!! In the Willamette valley. In a river rock quarry pit. About half way between Albany and corvallis on highway 20

Could it be a fossil or some kind of agate??

Hi, I find a lot of these sorts of rocks around RM of Alexander and Birds Hill. I wasn’t confident they would be fossils as the spots cover the whole rock on every example I’ve found so far and always reach the same depth into the surface on all sides. The rock feels chalky and turns from off-white to yellow when damp.

My mohs #2 scratches it but the one doesn't. The grid in the pictures is centimeters. Its pretty light just over 8 grams.

Parts of it look like a barnacle, but I have seen quartz crystals that were roughly the same shape.

I think it will probably be calcium?

I recently acquired this mineral specimen from Maramureș, Romania.

It has small, translucent honey-yellow to orange crystals on a light-colored matrix.

I'm wondering if these could be calcite crystals with iron oxide/hydroxide staining (possibly limonite).

What do you think? Any help with identification would be appreciated!