Questions tagged [rocks]
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236 questions
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1answer
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What are these purplish-brown and white rocks? [on hold]
I found these rocks along the train tracks in Monroe, Wisconsin. I mostly only took the ones with lots of white in them, but most didn't have that. I'm not sure what these rocks would be called. (...
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0answers
34 views
Can anyone identify these rocks?
I was swimming in the Mediterranean Sea and found all these shiny rocks underwater, so I dove down and got them. Any clue what these are? To be precise off the west coast of Northern Italy. Hopefully ...
3
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1answer
70 views
heavy, brown, rock with crystals, please help identify
please help identify this rock. it is heavier than most. dark brown color. picture is shown with streak test. found in Philadelphia pa. at home demolition site. crystals seem to be different type and ...
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0answers
36 views
Rock identification - origin unknown
I'm trying to identify this rock. It's fairly fine-grained and has a green tint. It's fairly heavy for its size, I cannot scratch it with a figernail but I can make a scratch with a knife. The rock is ...
2
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1answer
29 views
What kind of rock or stone is this? Where did it come from?
I found this on the side of the road in Oregon, i think it was left or forgoten about thats why it was left there but it has crystal pockets, multiple colors, some smooth sides, perfect circles and ...
0
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0answers
28 views
What is the identity of this rock?
I found this rock on the beach on the Dingle peninsula in Ireland. There were lots of sandstones and basalt too. I thought it might be dolomite because it is rhombohedral and has a white streak, but I ...
0
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1answer
26 views
What kind of stone is this? Can I safely test it with acid?
Found in Wisconsin, top appears black to dark blue, slightly translucent at the edges.
Is it safe to use acid to test this material?
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0answers
29 views
Hollow sound from ground
There is a spot in my parents dirt driveway that produces a hollow thump when stomped on or struck.
As far as I can tell, the gravel is only 3 inches overtop a large boulder.
The entire area is ...
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1answer
46 views
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34 views
Can anyone help identify this? Or point me in a direction of someone who could
Can anyone help identify? It's crystalline structure is non geometric transparent to light milky (white/purple area) clarity the green color appears gritty and solid like suspended inside the crystal. ...
0
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2answers
91 views
Can someone help me to identify this rock?
A-density:2.66g/cm3,weight:370g,rock attract the magnet
for this rock I do not have the density currently
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1answer
60 views
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29 views
Peculiar Piece of Petrified wood? Or just another piece
Multiple years ago I found a chunk of petrified wood in my grandmothers yard in Northern Utah, what is unique about it is you can see the transition from rock to wood. But the wood feels like wood, ...
2
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1answer
63 views
Help Identify My Rock Please
My daughter found this rock in a field and I am curious to know what exactly it is...please help!! Its like a white color (almost like concrete) but has specks of shiny blue and clear stones in it ...
1
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1answer
55 views
Glacial erratic - Granite or Gneiss?
This boulder is a glacial erratic in New Jersey. Can anyone tell if it's granite or gneiss? When you look at from the side, there appears to be foliation... but when you look at from the top or other ...
5
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3answers
109 views
How is this crumbly crystal-rich rock formed?
I found this crumbly rock embedded in the channel walls of a small creek in Everett, WA, USA. (North Creek that flows through McCollum Park.) If possible, I'd like to know how the rock formed... what ...
1
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1answer
61 views
What is this red rock with crystal white inside?
I found this rock in the desert. I found similar rocks that are crystal white on the inside, but this one is rough on the outside and all the others are smooth. Plus all the rough rocks doesn’t have a ...
0
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1answer
49 views
Can anyone help me identify this rock?
This is probably just something really common and boring to most people, but I was intrigued so I thought I might as well ask now I can. When I was in Portugal (I don’t know specifically where we were)...
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3answers
101 views
Can anyone help me identify these rocks please?
I apologize for any errors in my pictures or writing. My first post.
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2
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0answers
53 views
Whats this stone?
Found it couple days ago and it amazes me how smooth the surface is but cant identify it please help me.
Found it in north germany near a lake on a trip there.
0
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1answer
72 views
Need help identifying this rock
I need a little help identifying this rock. It was found somewhere in the Sahara Desert. It is very hard and leaves a beige streak on a steel file (might be the concretized dirt covering it). The ...
0
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1answer
76 views
Rock/mineral identification - smooth black inside
It’s yellow and grey on the outside but smooth and black on the inside. Very roughly 2.27 g/ml
Just curious, it almost like sea glass on the inside but it’s far too dense.
0
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2answers
91 views
Help me figure out what this purple rock is
I found this in the ground at a job site in blue springs mo . Its purple with darker purple lines through it like growth marks on a tree. It is about the size of a large loaf of bread 7 inches across ...
0
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0answers
37 views
Can anyone help me figure out what kind of rock this is?
I was cleaning out my basement and I found this wrapped in a cloth inside a tin case. Does this rock hold value? What is the geological history of it? I'd really appreciate insight on this.
0
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1answer
58 views
Could you help me identify these rocks please
Found these whilst walking around Warwickshire please could you help.thanks
0
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2answers
39 views
I believe we got this rock in the mountains of Creede Colorado
Solid, has some weight to it, looks like it possibly has some purple amethyst on the opposite side, but mostly consists of this silver:
Can anyone identify it as silver?
0
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2answers
45 views
What type of yellow-green stone is this?
It's greenish yellow with white. Got it in a mixed stone package from Amazon.
No luster, I'd say a 7 in hardness, it doesn't look homogeneous.
4
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1answer
48 views
Unidentified mineral found in France
(I am not a native english speaker, so I'm not really aware of the specific terminology.)
A few years back, I found an unidentified rock on a beach in Normandie (France). It looks and feels (texture-...
3
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1answer
73 views
How does this melted-wax erosion pattern form in sandstone?
How does this kind of erosion pattern that looks like melting wax form in sandstone? Can you describe the kinds of processes and kinds of rocks that are needed for this? I've seen it in Nevada, but ...
0
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1answer
55 views
Identify this transparent brown rock
t
The rocks are pretty small they are dark brown and comoleyelybsee through.
5
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1answer
176 views
Basalt, slag or meteorite?
I found this rock on the edges of a known Drumlin in North East England. It looks to be a fragment from a larger piece. It attracts a magnet strongly, it weighs 150 grams. It has vesicular holes (on ...
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0answers
22 views
Identification of rock samples
These samples were found unlabelled in a museum shelf. Could someone help me identify them?
https://imgur.com/a/LQ4qZ1T
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1answer
54 views
Identification of rocks
My mother found a lot of unlabeled rocks samples in a museum shelf and has to label them. Unfortunately, both of us know nothing about rocks. Could someone help us in identifying these samples?
https:...
2
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1answer
99 views
Please help me identify this stone (Look like some kind of quartz, but I'm not sure.)
My young sister found this stone on a street and she asked me what type it is. And I really don't know.
It was found in Western Ukraine, in North Galicia. But it may be that it was brought here from ...
1
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0answers
38 views
Identifying rocks, minerals
I am sorry to bother you.. before passing away, my grandfather gave me a special box that contained all types of beautiful, colorful rocks and minerals. I am having a hard time identifying them! Could ...
10
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2answers
102 views
Strange scar marks on pebble
My question is not specifically about identification of this piece of rock. Instead I am focusing on the origin of the scar marks on this rock. I have found this stone in the pebbles in the path. This ...
1
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1answer
70 views
Dark heavy rock
I found this dark heavy rock near Wombeyan Caves NSW. Australia. It is 9 by 6 cm and weighs 353g; it is not magnetic and was found in a dried up riverbed.
2
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1answer
116 views
Are these obsidian snowflakes?
I'm not sure if these are obsidian snowflakes:
I found it near a river, hardness is 4 to 5, it has a wax lustre when pre-polished. The 'flakes' in the matrix are raised and gray.
Pre-polished side
...
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0answers
47 views
Rock / Fossil ID?
Please see link below if anyone can help ID.
I think the little claw looking thing is a fossil?
The red rock is smooth,Matt in some places and semi glossy on some of the sides.
The black rock has ...
0
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1answer
36 views
Rock identification ? What kind of it is?
My co-worker had this rock and told me found just behind the store, Big R, and put on the table in the office.
Location is Trindad, Colorado.
2
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2answers
68 views
Need help to ID rock type
I found this rock in a freshly ploughed field, and it looked too unusual to pass up. Can anyone identify what it is?
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0answers
40 views
What kind of round grey rock is this? Is it a fossil of some sort?
Help me identify this rock please and thank you
1
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0answers
52 views
Can someone help me to identify this rock/mineral?
This is a small piece of a bigger chunk (about 9kgs). Someone told me it might be meteorite since its heavy for its size and has shiny particles. Others told me it might me an iron ore (magnetite). ...
2
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1answer
83 views
Why would CaO be more finely spread than K2O in Granodiorite?
I recently interpreted some XRF data on samples of a granodiorite which were classified under three different types of physical characteristics: very little, mild and significant levels of weathering. ...
1
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1answer
44 views
Help identifying rock?
Found in stream, heavy, has a tin of red lines and dark. 1]]2[grey white, rusty ]3. Dark lines n rusty lines. Hard to break off piece ain't magnetic
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2answers
57 views
0
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1answer
49 views
What is this rock?
I found this rock in my backyard when I was little in New Zealand and I’m just wondering if anyone has an idea on what kind of rock it is and is it worth anything
1
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1answer
70 views
Can you help me identifying this beige/brown rock?
I found this stone in a box where I keep some memorabilia. Unfortunately I don't know, where it's from, maybe it's from a mountain side in the alpins or from a beach at the mediterranean sea. One side ...
2
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2answers
52 views
Grey rock with black inclusions (Vancouver Island, B.C, Canada)
I found it on Vancouver Island, B.C, Canada. It is reflective like a safety vest and has crystals.
