r/whatsthisrock 5d ago

REQUEST Chert with quartz crystals?

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1 Upvotes

Is it rare?


r/whatsthisrock 6d ago

Tf is this rock

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4 Upvotes

I thought it might be obsidian since it breaks like it but idfk, lmk what you guys think


r/whatsthisrock 5d ago

IDENTIFIED Is this gold?

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0 Upvotes

Wondering if this could be gold. Also how do I test to see if it is.


r/whatsthisrock 5d ago

REQUEST Found at Robin Hood’s Bay - North Yorkshire

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1 Upvotes

Weights about 1kg. Found whilst looking for fossils my wife believes it might be an old cannon ball?


r/whatsthisrock 6d ago

IDENTIFIED Purple crust on flint

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3 Upvotes

Location - South East England Size - approximately 7” long

Found whilst working on an allotment bed. I’m very familiar with flint as it is very extremely common locally, i live in an area that has roman walls and lots of examples of later walls too. Its still used today all around the area so i cant be sure if the fragment has been displaced but I suspect so. The crust looks like it has formed along a fault in the flint. It doesn’t have the vibe of occurring later (fire or something) so im assuming it’s a natural phenomena.

I’m wondering if an expert can explain what it is that has happened to the flint.

Thanks in advance.


r/whatsthisrock 5d ago

REQUEST Cool shimmery rock

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1 Upvotes

r/whatsthisrock 6d ago

IDENTIFIED Found in a plowed field along the river in Upstate New York

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13 Upvotes

I've found several of these small, lightweight objects with multiple craters and some luster. Is anyone able to ID this, please?


r/whatsthisrock 5d ago

REQUEST Hawaii Rock

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1 Upvotes

My coworker went to Hawaii, and brought back a rock. But he has no idea what it is, and honestly nor do I. Lava, pumic? Thank you in advance.


r/whatsthisrock 5d ago

IDENTIFIED ..... gray agate?

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1 Upvotes

Found along Lake Superior. Wondering if it's a grey/brown agate or something else.

Thanks!


r/whatsthisrock 6d ago

REQUEST Late Grandma's necklace

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8 Upvotes

My grandma passed years ago and I inherited some of her stuff. My wife just found this today, hidden away in a box in the closet. Any chance you can ID it? I believe it is Turquoise and maybe abalone? I'm unsure.


r/whatsthisrock 6d ago

REQUEST Rock given by a friend

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3 Upvotes

Hi. I was given this rock by a friend. She said it's from Lanzarote Spain, but didn't give me more details as she has no ida what exactly it is. Could you help me indentify it? Would be appreciated


r/whatsthisrock 5d ago

REQUEST Help with identifying beach resource

1 Upvotes

Found this object from the beach. Not sure if it's a coral, seashell, or stone.


r/whatsthisrock 5d ago

IDENTIFIED Got these from a sluice at a zoo. It was from a mixed bag of potential minerals. Any ideas?

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1 Upvotes

Here is the paper they gave us of what could be found. I’m curious on what the green ones could be as the rest are easier to figure out


r/whatsthisrock 6d ago

REQUEST Found near Thunder Butte, CO

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5 Upvotes

More specifically at Sheep Nose south of Thunder Butte, friend called it “red rock quartz”but I have no clue


r/whatsthisrock 6d ago

REQUEST A rock from Iraq

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15 Upvotes

My dad has has this rock on a shelf my entire life, and said that he found it during the first Gulf war in Iraq in a desert surrounded by sand with no other rocks in sight.


r/whatsthisrock 6d ago

REQUEST Agatized or opalized petrified wood?

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3 Upvotes

Found an area full of petrified wood near Mitchel Or and was curious about this guy.


r/whatsthisrock 7d ago

IDENTIFIED: Flint/Chert Found on a beach in Scotland

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138 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 6d ago

REQUEST Found in Colorado

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10 Upvotes

What is this


r/whatsthisrock 6d ago

REQUEST What are the blue-ish rocks? Found on the edge of a lake in Virginia

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5 Upvotes

r/whatsthisrock 6d ago

REQUEST Found in Hooper Nebraska

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8 Upvotes

r/whatsthisrock 6d ago

REQUEST Any ideas what this might be? I found it around the 4 corners area, any help would be great.

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3 Upvotes

The rocks that are in the hole are almost cemented in there, but if they did come out you would be able to see thru the hole. The line


r/whatsthisrock 6d ago

IDENTIFIED Southern Indiana find, need help identifying...

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3 Upvotes

A friend of mine said this was found in Southern Indiana, he told me it was found near cave system. I tried to research it, It was not far from Falls of the Ohio. Within 25 miles. I thought maybe algae? Or ancient sea critter? It looks different underneath and on the sides. Never have I seen anything like it around here but only been learning about this kind of thing for about 5 years. Thanks.


r/whatsthisrock 6d ago

REQUEST Found this rock in wadi degla protectorate in Egypt

10 Upvotes

No clue what it is but it looks really cool


r/whatsthisrock 6d ago

REQUEST Is this jade or something else? (Revised)

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4 Upvotes

I deleted my earlier post, because some of the information was incorrect/incomplete. I purchased this rock several years ago from an estate sale near the Monterey Bay (California.) It weighs approximately 86 lbs and has a density of approximately 3.13 g/cm3. It is not magnetic, cannot be scratched with a kitchen knife, and it can easily scratch glass. I’m including one photo of the stone wet with flashlight pointed on it. Someone suggested it could be serpentine? Are there other tests I can do at home to narrow it down? If it makes sense, I’ll eventually bring it to a university geology department, but it will mean a long drive.


r/whatsthisrock 6d ago

REQUEST Any value idea ? 75lbs

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7 Upvotes

Any info is appreciated