The rocks tag has no usage guidance.
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16 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 ...
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1answer
29 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.
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0answers
20 views
Can someone help identify this stone please [on hold]
I have numerous rocks that are in need of identification, and hoping someone knowledgeable can help! In rough form it’s a metallic blad almost waxy, and some show red or green underneath
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1answer
40 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 ...
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0answers
27 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.
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1answer
36 views
Could you help me identify these rocks please
Found these whilst walking around Warwickshire please could you help.thanks
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2answers
34 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?
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2answers
39 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
38 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
48 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 ...
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1answer
50 views
Identify this transparent brown rock
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The rocks are pretty small they are dark brown and comoleyelybsee through.
5
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1answer
117 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
19 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
53 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
86 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
35 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
93 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
59 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
106 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
46 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 ...
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1answer
35 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
64 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
35 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
47 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). ...
1
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1answer
58 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
42 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
54 views
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1answer
45 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
69 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
45 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.
3
votes
1answer
84 views
Differentiate a rock and mineral
How to differentiate between a rock and a mineral by merely looking at it as a thumb rule?
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2answers
107 views
Help identify this red and black rock
Last weekend in a field I found a rock that seems burned and heavier than other rocks, but I have no idea what it is. I measured body by using handmade tool afterwards calculated the density as 3.24&...
2
votes
1answer
97 views
Rock ID: translucent, hard, smooth, heavy for size dark green/black to white(around edges) east coast Australia in surf
Hi there, I found this rock in the surf somewhere on the east coast of Australia around 20 years ago. Not sure if this is sea glass or a rock but hoping someone can help me identify as it has bugged ...
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1answer
71 views
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2answers
65 views
What kind of rocks are these light-colored ones with shiny metallic inclusions?
My dad found these rocks in his garden. They have some shiny metallic looking pieces in them. Would anyone be able to identify what they are? We live in South Africa if that helps. Thanks!
3
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3answers
112 views
Help! Can anyone identify this deep blue rock, quartz, crystal thing from Washington?
I was like 10 waiting for my dad to get off work. He was a surveyor and brought this blue rock thing with him for me when he got off. He said they were surveying and his friend took a pickax to a rock ...
1
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1answer
59 views
What is this white and deep red rock found in Morocco?
Rock found in Morocco and haven't been able to figure out what it is! Please help!
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0answers
63 views
I found this rock on Laguna Beach [closed]
Rock found on Laguna Beach. It is not sand stone and is heavy for its size 3" x 2". It is rather dense.
Click the image for full size:
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0answers
48 views
I need help identifying this pinkish rock found in Morocco
Found in Morocco, the oriental region, exactly in Oujda, near the Algerian border in the deep woods with another one with the same shape and colors.
Not heavy.
Feels very smooth.
3 colors : White - ...
3
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3answers
77 views
What is meant by intraplate volcanism?
I am having massive confusion on whether intraplate volcanism refers to volcanism occurring at plate boundaries or away from plate boundaries (such as formation of ocean island basalts), or perhaps ...
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2answers
97 views
Can anyone identify this dark rock that I found near my house? [closed]
I found this black heavy rock near my house, as you can see it has this rounded shape and I can't tell what it is.
3
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1answer
72 views
Need help identifying this cylindrical layered rock found in Bolivia
I found this rock in a tropical climate river in Bolivia (specifically Ivirgarzama). It seems to have 5 or 6 layers.
1st layer is a slightly course matte rock layer
2nd layer is a more glossy rock ...
3
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1answer
65 views
What is this shiny rock with varying shades of white/yellow/brown from Colorado?
I am posting this picture and I am very interested to know what kind of this rock is it?
Where: Found this at my house. I live in rural area. One acre of land with few houses nearby...
Location: ...
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1answer
98 views
What is this stone or rock that looks like chocolate chip cookie dough?
Would anyone be able to tell me what kind of stone this is? It looks to have smoky quartz pieces throughout it but I’m not 100% sure. Has anyone seen something like this before? Thanks in advance!
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1answer
57 views
How can I tell the difference between granite and syenite?
(I'm not a geologist, just helping my kids collect rocks).
2
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1answer
64 views
What is this green and blue rock found on the beach which turns orange when light is shone through it?
I need help identifying what kind of rock this is?
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3answers
105 views
Is this a meteor? It's very heavy for its size [closed]
Here it is. Hope this helps you best image I could take.
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2answers
374 views
What is the identity of this heavy, smooth, shiny black and red rock?
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It's very shiny and layered. It has rough texture but spots with smooth red colored pieces.
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0answers
185 views
What type of rock is this black and brown rock found in Virginia caverns?
Found this rock deep in the Luray Cavern System, what is it?
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1answer
46 views
What is the parent rock in this photo?
Please help find out what this rock formation is and where it is found in the world?
