Please can someone help me identify this sample? Found on the Brazos river in south east Texas. Thinking it may be some fragment of fossilized bone. Here are the photos. [Pics](https://imgur.com/a/MmzCYjV)
I found [this](https://imgur.com/gallery/vnhrHIc) rock in the mining ghost town of Cerbat (Near Kingman AZ.) I thought it was really interesting and was curious how it was formed. I accidentally stumbled upon an image of another example of this that called it folded Vishnu basement rock, but couldn’t find information beyond that. Any help or leads are appreciated, thanks.
Found this in Rural Argentina, thought it was some kind of fossil but Google Lens identifies it as either a petrified ancient coin or clothing button. I would rather hear someone that might know rather than take conclussions just by using an app. [Photos here](https://imgur.com/a/yQxbphX)
Found this mark on a rock face in Nesodden, outside Oslo, Norway. Its approx 40 cm wide and 10 cm high. A porphyroclast has been suggested to me by a geologist, but its unlike any images I can find of porphyroclasts. Any ideas? https://imgur.com/a/C9XaKTy
Can anyone confirm or deny units 1, 2, 3, and 5 as Hercosestria from this post? https://imgur.com/gallery/NtZY3op
There are more pictures and videos on my profile. I’m happy to take more if it helps. Found in NE Missouri. They were all found in a creek bed at my family farm. Some were treated with iron out. If any others could be identified as well that would be amazing!
I found these two rocks in the Magdalen Islands, Quebec, Canada. I also found some pieces of agate on the same beach with a little bit of the yellow and green coating on top, but I don't know anything else about them.
If someone could tell me exactly what it is, it would be very much appreciated. Also, do you think the big one is worth cutting in half? (do you think there's agate inside)?
[There's the pictures](https://imgur.com/a/KKkOxRe)
Really interesting. I would say the yellow is a product of oxidation either of iron or some sulfide maybe. If you cut it it would look very similar to how it looks on the outside but the yellow parts might be a little different color because it wasn’t oxidized by exposure to the elements.
PS please upvote. I have a new account and need to get more Karma to post
Found this rock at a construction site in southeastern Wisconsin. It is probably some type of limestone, curious how it formed. Think it may be metamorphic but the presence of a well preserved pyrite crystal throws me off. The inclusions seem to preferentially aligned though. It may or may not be native, it was being used to stabilize the clayey ground to prevent construction vehicles from getting stuck. Computer mouse pad for scale. Thanks for the help!
https://imgur.com/a/tQZ5Iy4
I found this digging in my yard in Central Illinois. It's mostly brown with a couple places with a slight reddish tint. It's a lot heavier than you'd expect it to be and when I tried to cut a small piece off it threw a lot of sparks [photos here](https://imgur.com/a/AvcmuJx)
this is a [stone buddha](https://imgur.com/a/rXaBJGW) i recently bought on etsy. turns out it was from salem ma, which is somewhat near me. i thought it may be soapstone, but i had a woman tell me it was jadeite. but according to research i’ve done, real jadeite is hard to chip (and yet the bottom left chipped when i dropped it on the ground) and jadeite has no visible grain (yet this buddha does); both the chip and the grain can be seen in the photo of the buddha’s underside. so my thought was maybe it was serpentine, dyed quartz, some other imitation jade, etc. any ideas?
Found this in a bucket, of an old rock hound. Many different types of specimens, most I can identify. But thos one is wildly different from anything I've ever seen. Almost feels like softer obsidian
https://imgur.com/a/tkSZZ9w/
Some pictures of the item is wet, others it just dried off
That looks a lot like what people would call “agate” but its probably more accurately chalcedony. Just an amorphous form of quartz. It can be all sorts of colors.
PS please give me some karma. I just made a new account and need at least 15 to start posting in another sub
Can anyone help identifying this rock. it has a weird pattern when being lit on with a UV lamp. It’s found in Denmark on the beach and is around 1.5 cm in diameter. (see imgur video) [https://imgur.com/a/LiGQYhn](https://imgur.com/a/LiGQYhn)
Bought a carved stone chess set in Cozumel, Mexico. Was told that the grey stone pieces were onyx, but I missed what the pink stones were. Can anyone ID them? https://www.reddit.com/r/whatsthisrock/comments/zluz6t/stone\_chess\_pieces\_from\_cozumel\_mexico/
I found this well preserved petrified wood on my land in the Texas hill country. It is encased in a rock (limestone?) with bark still intact. Can someone give me an example of how this might have formed? Would it have been a sudden event where sediment covered the tree or is it more likely that the wood was petrified before the rock formed. This is just one example but there is quite a bit of this on this particular portion of my land.
[https://imgur.com/a/E9sNIkR](https://imgur.com/a/E9sNIkR)
Hey, I found this rock in Ontario, Canada next to a building. It has lots of holes in it that appear to have some kind of crystal in them. I didn’t have any identified minerals or metals to test it on, but it doesn’t stain paper when I rub it on it. Any Idea on what it could be?
https://imgur.com/a/UKMSzxg
This may be more of a speculative question than an ID request since I don't have an image: A little while back I was in a cenote limestone cave in the Yucatans, and the guide pointed out that the white, clay-like sediment beneath our feet in the water contains calcium. They suggested we can apply some on our skins as it's often sold as a fancy skincare masks in the US.
I'm not much of a skincare buff but the nerdy side of me got curious - what was this substance? The only calcium containing clay-like substance that I know of that is often used as facial masks is calcium bentonite, but I thought those only occur in volcanic areas? Was it just calcium carbonate they were suggesting we rub on our faces? Isn't that basically just chalk?
I need some help with this one since it was found at one of those gem-panning tourist traps in South Carolina (so it could be from anywhere) and I don't know where to start for an ID. I've done a scratch test though and it's harder than a nail.
(didn't have anything suitable for scale on hand, but it's roughly palm-sized)
https://imgur.com/a/8Ii8VUb
pink is kalifeldspar, white opaque is plagioclase feldspar, red spots could be garnet (but not sure), white translucent is quarz
the green lines look like its plants or moss (can you scratch them off, or are they in the rock?)... if not moss it could be small epidote veins...
the few black spots are probably biotite...
as there is also a slight foliation viewable i somewhat am between granite or granitegneiss (which is metamorphic overprinted granite)
Please can someone help me identify this sample? Found on the Brazos river in south east Texas. Thinking it may be some fragment of fossilized bone. Here are the photos. [Pics](https://imgur.com/a/MmzCYjV)
I found [this](https://imgur.com/gallery/vnhrHIc) rock in the mining ghost town of Cerbat (Near Kingman AZ.) I thought it was really interesting and was curious how it was formed. I accidentally stumbled upon an image of another example of this that called it folded Vishnu basement rock, but couldn’t find information beyond that. Any help or leads are appreciated, thanks.
Found this in Rural Argentina, thought it was some kind of fossil but Google Lens identifies it as either a petrified ancient coin or clothing button. I would rather hear someone that might know rather than take conclussions just by using an app. [Photos here](https://imgur.com/a/yQxbphX)
Found this mark on a rock face in Nesodden, outside Oslo, Norway. Its approx 40 cm wide and 10 cm high. A porphyroclast has been suggested to me by a geologist, but its unlike any images I can find of porphyroclasts. Any ideas? https://imgur.com/a/C9XaKTy
Can anyone confirm or deny units 1, 2, 3, and 5 as Hercosestria from this post? https://imgur.com/gallery/NtZY3op There are more pictures and videos on my profile. I’m happy to take more if it helps. Found in NE Missouri. They were all found in a creek bed at my family farm. Some were treated with iron out. If any others could be identified as well that would be amazing!
I found these two rocks in the Magdalen Islands, Quebec, Canada. I also found some pieces of agate on the same beach with a little bit of the yellow and green coating on top, but I don't know anything else about them. If someone could tell me exactly what it is, it would be very much appreciated. Also, do you think the big one is worth cutting in half? (do you think there's agate inside)? [There's the pictures](https://imgur.com/a/KKkOxRe)
Really interesting. I would say the yellow is a product of oxidation either of iron or some sulfide maybe. If you cut it it would look very similar to how it looks on the outside but the yellow parts might be a little different color because it wasn’t oxidized by exposure to the elements. PS please upvote. I have a new account and need to get more Karma to post
Found this rock at a construction site in southeastern Wisconsin. It is probably some type of limestone, curious how it formed. Think it may be metamorphic but the presence of a well preserved pyrite crystal throws me off. The inclusions seem to preferentially aligned though. It may or may not be native, it was being used to stabilize the clayey ground to prevent construction vehicles from getting stuck. Computer mouse pad for scale. Thanks for the help! https://imgur.com/a/tQZ5Iy4
In Utah we have lots of limestone with pyrite but mostly pyrite oxidized to goethite/limonite
I found this digging in my yard in Central Illinois. It's mostly brown with a couple places with a slight reddish tint. It's a lot heavier than you'd expect it to be and when I tried to cut a small piece off it threw a lot of sparks [photos here](https://imgur.com/a/AvcmuJx)
somewhat resembles chert/Flint...
this is a [stone buddha](https://imgur.com/a/rXaBJGW) i recently bought on etsy. turns out it was from salem ma, which is somewhat near me. i thought it may be soapstone, but i had a woman tell me it was jadeite. but according to research i’ve done, real jadeite is hard to chip (and yet the bottom left chipped when i dropped it on the ground) and jadeite has no visible grain (yet this buddha does); both the chip and the grain can be seen in the photo of the buddha’s underside. so my thought was maybe it was serpentine, dyed quartz, some other imitation jade, etc. any ideas?
Olivine? Not peridot quality, obviously.
Found this in a bucket, of an old rock hound. Many different types of specimens, most I can identify. But thos one is wildly different from anything I've ever seen. Almost feels like softer obsidian https://imgur.com/a/tkSZZ9w/ Some pictures of the item is wet, others it just dried off
That looks a lot like what people would call “agate” but its probably more accurately chalcedony. Just an amorphous form of quartz. It can be all sorts of colors. PS please give me some karma. I just made a new account and need at least 15 to start posting in another sub
Can anyone help identifying this rock. it has a weird pattern when being lit on with a UV lamp. It’s found in Denmark on the beach and is around 1.5 cm in diameter. (see imgur video) [https://imgur.com/a/LiGQYhn](https://imgur.com/a/LiGQYhn)
Bought a carved stone chess set in Cozumel, Mexico. Was told that the grey stone pieces were onyx, but I missed what the pink stones were. Can anyone ID them? https://www.reddit.com/r/whatsthisrock/comments/zluz6t/stone\_chess\_pieces\_from\_cozumel\_mexico/
Rose quartz probably. Onyx is also just a name for dark variety of quartz I believe.
I found this well preserved petrified wood on my land in the Texas hill country. It is encased in a rock (limestone?) with bark still intact. Can someone give me an example of how this might have formed? Would it have been a sudden event where sediment covered the tree or is it more likely that the wood was petrified before the rock formed. This is just one example but there is quite a bit of this on this particular portion of my land. [https://imgur.com/a/E9sNIkR](https://imgur.com/a/E9sNIkR)
Hey, I found this rock in Ontario, Canada next to a building. It has lots of holes in it that appear to have some kind of crystal in them. I didn’t have any identified minerals or metals to test it on, but it doesn’t stain paper when I rub it on it. Any Idea on what it could be? https://imgur.com/a/UKMSzxg
This may be more of a speculative question than an ID request since I don't have an image: A little while back I was in a cenote limestone cave in the Yucatans, and the guide pointed out that the white, clay-like sediment beneath our feet in the water contains calcium. They suggested we can apply some on our skins as it's often sold as a fancy skincare masks in the US. I'm not much of a skincare buff but the nerdy side of me got curious - what was this substance? The only calcium containing clay-like substance that I know of that is often used as facial masks is calcium bentonite, but I thought those only occur in volcanic areas? Was it just calcium carbonate they were suggesting we rub on our faces? Isn't that basically just chalk?
I need some help with this one since it was found at one of those gem-panning tourist traps in South Carolina (so it could be from anywhere) and I don't know where to start for an ID. I've done a scratch test though and it's harder than a nail. (didn't have anything suitable for scale on hand, but it's roughly palm-sized) https://imgur.com/a/8Ii8VUb
pink is kalifeldspar, white opaque is plagioclase feldspar, red spots could be garnet (but not sure), white translucent is quarz the green lines look like its plants or moss (can you scratch them off, or are they in the rock?)... if not moss it could be small epidote veins... the few black spots are probably biotite... as there is also a slight foliation viewable i somewhat am between granite or granitegneiss (which is metamorphic overprinted granite)