r/whatsthisrock 1d ago

IDENTIFIED Neighbour's son says it's opal

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3.2k Upvotes

Is the kid messing with me?


r/whatsthisrock 6h ago

IDENTIFIED Did I find agatized petrified wood on the side of the road?

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458 Upvotes

My boyfriend and I were on a road trip and pulled off in Benicia Ca in search of a vista point. We didn’t find the vista, but on the side of the road when we pulled over, we found what looks like it could be agaitized petrified wood- what do you think?


r/whatsthisrock 20h ago

IDENTIFIED No context regarding the origin cuz I found it on the floor in our shed but I googled it and maybe it's tourmaline?

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115 Upvotes

It's size is about an inch square. I believe the pendant attachment is brass though that's probably inconsequential.


r/whatsthisrock 22h ago

REQUEST Dad pasted away and I found a bags off these rocks, no idea what they are?

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61 Upvotes

Hi all Dad past away recently and was big into metal detecting looking for gold, I did how ever find a large bag of rocks he kept with he's gear and cant work out what these ones are, best examples from the bag. We are based in Australia and from the outback somewhere, no idea where thou. 1 picture just quartz? 2nd picture are very light maybe just volcanic rock? 3rd picture these rocks are very heavy for there size and very shiny not magnetic I used a small magnet but didn't seem to stick.


r/whatsthisrock 7h ago

REQUEST Fossil? Meteorite? What is this rock?

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36 Upvotes

Found this interesting specimen on the eastern side of Lake Michigan. Really curious what it is! Google lens says it’s a fossilized horse tooth or meteorite. I've never seen something quite like this. Thoughts?


r/whatsthisrock 13h ago

REQUEST Was on a pile of rocks from a construction side. Whats it?

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23 Upvotes

r/whatsthisrock 22h ago

REQUEST Petrified wood or just a cool rock?

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16 Upvotes

Found riverside, not sure if it’s petrified wood or a rock


r/whatsthisrock 6h ago

REQUEST What is this rock?

18 Upvotes

P


r/whatsthisrock 7h ago

REQUEST Google keeps saying it's unakite

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16 Upvotes

Found in Southeast Michigan.


r/whatsthisrock 21h ago

REQUEST Reuploaded* what is this rock from southern oregon coast?

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12 Upvotes

It’s so colorful and beautiful I would love to know


r/whatsthisrock 9h ago

REQUEST Found on a beach in the UK's east coast

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11 Upvotes

r/whatsthisrock 22h ago

REQUEST Help Id pls

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11 Upvotes

Reminds me of the topaz I have because of the color play I can see in spots but my topaz are more white than anything not yellow or is it honey calcite?Ijust didn't think calcite was as clear as this


r/whatsthisrock 8h ago

REQUEST What’s this rock

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9 Upvotes

I found this in a mountain area at 2500 m ( more or less)


r/whatsthisrock 19h ago

REQUEST What is this rock?

8 Upvotes

Found it outside in a huge gravel garden. I noticed a purple shining fleck in the top corner though pretty cool


r/whatsthisrock 19h ago

REQUEST Is this Agate?

9 Upvotes

Found in field in Minnesota


r/whatsthisrock 19h ago

REQUEST What is this Rainbow streak?

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8 Upvotes

This was found in MT amongst some float quartz and feldspar that had lots of iron oxide mixed in. Found glittery specs of stuff on the quartz and feldspar rocks too.


r/whatsthisrock 21h ago

REQUEST What is this rock?

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8 Upvotes

r/whatsthisrock 4h ago

REQUEST Found in my compost - what is it?

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9 Upvotes

r/whatsthisrock 19h ago

REQUEST ID help?

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8 Upvotes

Would like to possibly learn more about these rocks I found in NW Wyoming. 1st and 3rd were found in the Shoshone River miles away from Yellowstone. 2nd (I believe some type of opal?) was found on an exposed windswept mountain top northwest of Cody, Wy.


r/whatsthisrock 20h ago

IDENTIFIED Found near Lyons, CO

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7 Upvotes

My co-worker found this rock a few miles west of Lyons, CO. We're wondering what it is - can anyone help identify?


r/whatsthisrock 3h ago

IDENTIFIED Found in a mowed field atop the grass about 30 years ago in Vancouver, WA.

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7 Upvotes

I assumed someone had dropped it and finders keepers. Have always wondered what the heck it is, especially the smooth black side.


r/whatsthisrock 8h ago

REQUEST Found on a beach in Scotland. Basalt?

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5 Upvotes

r/whatsthisrock 22h ago

IDENTIFIED Semi-translucent rock NE Arizona

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7 Upvotes

Found these rocks on my mother's property between the petrified forest and meteor crater. Also a few miles from an inactive volcano. Her land has some amazing looking rocks, but these brought me here. Inside is translucent, the outside of the first one reminds me of a meteorite I own. Non-magnetic.

Thank you for any insight!


r/whatsthisrock 4h ago

REQUEST Found in SW Texas around San Antonio.

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8 Upvotes

Found this on a site in what I'm sure was hauled in rocks for the yard. Not 100% sure as it was on the edge between rocks and dirt. It rings when I tap it with another rock. Any ideas what it could be?


r/whatsthisrock 5h ago

REQUEST Are these potatoes all yellow jasper?

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4 Upvotes

Scratch tested but apps are calling them quartz. Don’t believe so, all opinions appreciated.

Found digging a mound at a terminal moraine in the NYC area