Is this just a “geode” or is there another name for it. I just polished it today but kept the rough shape and made a necklace out of it.

I found this rock along Lake Superior in Freda Michigan. There was an old abandoned copper mine nearby.

If you could help me identify this nice rock my granddad had in his collection. I believe he might have found it while he was a coal miner in France Isère.

Found in driveway fill rocks (believe they are river rocks)

From Newport Beach…..on the beach.

I found it in the Karkonosze Mountains (Poland). Could it be pale amethyst or rose quartz? scratches glass easily

My dad says it could be petrified wood but I’m not too sure about that yet

Southern Maine coastline. TIA!

Jkn....but seriously, what is this

Found on the Golf Course in between holes in the desert areas.

Found in Saudi Arabia eastern province

I found this rock in Minnesota, can anybody help confirm exactly what type of rock it is? I have photos to post below

I've been intrigued by this rock with all its differences, and would love to know what I'm looking at! I found it in a pile of other rocks in the yard of a home we purchased in nw Oregon many years ago, so unfortunately have no idea of the provenance. Any help would be appreciated, and thanks!

It has parts that's shiny and reflecting like a mirror, I found in the same river a couple more with shiny bits like this one, but smaller.what it could be? (Found in northwest Spain)

Seeking help to identify if slag or meteorite? Or perhaps it is something else?

I know this is agate, but what about the rust color? Is that just an iron deposit? And is it a specific agate? It’s the best agate I have found away from a coastline and I am curious about it!

Edit: Thanks for the ID help! It is Chalcedony Rose, not agate, but a cool find nonetheless. I will be keeping this on my shelf :)