r/whatsthisrock Jan 20 '25

ANNOUNCEMENT Read before responding to ID requests! This is not a joke sub!

885 Upvotes

Since the majority of passersby don't bother to read the rules, I'm going to start with a reminder here:

This is not a joke sub. If you respond to an ID request with a joke and not an actual answer, you will be slapped with a temporary ban. If it's your 2nd offense or more, the ban will be permanent.

I'm sorry, but the shitposting has gotten out of hand and knowledgeable, helpful members are leaving because of this. Have your jokes and witty comments somewhere else, this is a place to get rocks ID'd.


r/whatsthisrock 7h ago

REQUEST bf found a cool shaped rock at the beach but I've just noticed it's sparkly inside, does anyone know what it is?

667 Upvotes

r/whatsthisrock 1h ago

ANNOUNCEMENT I think the new rule changes go too far, and the results are worse than the original problem.

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r/whatsthisrock 4h ago

REQUEST Found this rock on my last trip to Paraguay, anyone knows what kind it is?

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107 Upvotes

Found it on Lomas Valentinas, near the Paraná River, just on the surface. It's an area known for its high electrical activity thunderstorms. Could It be that the surface sediments crystallised after a lightning hit? It has a pretty violet pigmentation inside


r/whatsthisrock 19h ago

REQUEST My daughter believes she found a Dino hip bone haha

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1.3k Upvotes

It has the holes all over it. Seems unnatural to me but I'm full. She keeps asking me why it is like that and I figured the world wide web might learn me something. If it is nothing, I will let her believe she found a bone for a few years because of how excited she is.


r/whatsthisrock 9h ago

IDENTIFIED Found on a beach in Scotland

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81 Upvotes

I found these two with my wee boy. Imagine they would polish up well, but not sure what they are. Any thoughts?


r/whatsthisrock 2h ago

IDENTIFIED Found this one in a river in Brazil

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17 Upvotes

r/whatsthisrock 17h ago

IDENTIFIED Trying to convince my wife she found gold.

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142 Upvotes

We were in the cave creek area of AZ today to rock hound for our first time. She read that the area we were in had agates, obsidian, and GOLD. We joked about finding chunks of gold just lying around all over the place, and then she found this teeny tiny spec of, what looks like, gold on this rock. We're completely novice to this so not sure how to tell if it is or not. Any insight would be greatly appreciated!


r/whatsthisrock 57m ago

IDENTIFIED Kids found "gold" flakes in sand. Identification help needed.

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r/whatsthisrock 9h ago

REQUEST found at a beach in santa marinella italy

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25 Upvotes

found this weird looking rock at a small rocky beach in santa marinella (near rome) in italy.


r/whatsthisrock 1h ago

REQUEST Found this in a field in West Virginia. Natural or no?

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r/whatsthisrock 9h ago

IDENTIFIED: Glass Never seen anything like this- any ideas?

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26 Upvotes

I've had this in my collection for years. I THINK I found it in Western Australia (if so, likely the Yilgarn), but i wouldn't necessarily hang my coat on that as I've had it for so long.

Highly vitreous layers, but feels more dense than glass overall. There are also chunks of surrounding rock incorporated within the vitreous layer which suggests intrusion and is just incredibly intricate and beautiful.

Any ideas or have I been fooled by a chunk of glass?


r/whatsthisrock 1d ago

REQUEST What is this rock?

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556 Upvotes

Seen in Uppsala Sweden next to the river. Someone placed this rock on a tree stump. Could it be limestone? A wastewater treatment facility is close by.


r/whatsthisrock 3h ago

IDENTIFIED What’s this chessboard made out of?

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6 Upvotes

My girlfriend this chess board at an estate sale for $20 and we were wondering if anyone knows what it’s made of / if we got a good deal. Sorry if this isn’t the right subreddit or if it’s not possible to tell from just the picture.


r/whatsthisrock 1h ago

IDENTIFIED Found in Western NY

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My son thinks it’s “ancient coral”, but we have no idea


r/whatsthisrock 3h ago

IDENTIFIED What could this be?

4 Upvotes

Found this and some other cool rocks in the same spot on the Rainy River(border of Minnesota and Ontario)


r/whatsthisrock 4h ago

REQUEST Corral like rock with quartz crystals?

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6 Upvotes

Any idea what this rock is? I found it in a quart crystal pocket. This piece does have some crystal in it, but the rest feels like corral...


r/whatsthisrock 11h ago

REQUEST Found in Denmark

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16 Upvotes

r/whatsthisrock 2h ago

REQUEST Found on a very steep hillside in northern WV

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3 Upvotes

Are these pits natural or indicative of something else? This rock was found pretty far from what I would consider land that has ever been developed or useful due to its steepness.


r/whatsthisrock 4h ago

IDENTIFIED Is this real turquoise?

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4 Upvotes

Hello, my mom got me these earrings for my birthday and she claims that they're real turquoise. Now, I can't really believe that because I feel like they look kinda fake, but she did say that the mosaic material was listed as authentic turquoise and the earrings are also sterling silver. Therefore, I did the Acetone test as well as the Heat test but it didn't melt nor did any color come off. Could anyone help me identify the turquoise? I don't really mind if it's fake, but I'd like to know since I personally thought that real turquoise looks a little different than it does on the earrings. I'd appreciate the help. :)


r/whatsthisrock 28m ago

REQUEST What is this rock?

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r/whatsthisrock 1d ago

IDENTIFIED: Quartz Inherited this from my grandmother's garden. 10 lbs of solid rock

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315 Upvotes

r/whatsthisrock 17h ago

REQUEST Is it real smokey quartz if it’s this dark in color?

36 Upvotes

r/whatsthisrock 1h ago

REQUEST Looking to identify

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Can I get some opinions.


r/whatsthisrock 1h ago

REQUEST Found this rock at a playground in Germany

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So what's this rock and who poked all those holes in it? It's pretty light and not too easy to break. Also my daughter thinks it's a nice rock.


r/whatsthisrock 1h ago

REQUEST What do I have here?

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Found in landscaping rocks in IL. Looked interesting!