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Showing results for tags 'Mineral'.
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any help or advice to open this up its the size of a rugby ball thank-you
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Anyone know what this green mineral is in this cephalopod fossil?
loganas posted a topic in Fossil ID
I found it in Southern Ontario next to a creek. I know it's a straight shelled cephalopod but anyone know the green mineral inside.
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Found near mountain / river / creek bed in northern cali. So perfectly two toned. It’s heavy for the size 4”x2”. How does this even happen so neat! Not a whole lot of explanation when I searched online anyone have any more insight?! Thank you so much!
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Recently found what I thought was a turtle shell. However the more I examine it the more it looks like a rock/mineral. Interesting pattern on top, side and bottom. Any ideas? Images are side view, bottom and top
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Hello! Can someone tell me what is this, please? Is it walrus ivory and what about the mineral formation inside?
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Included are some zoomed in pics using a handheld microscope. Thanks
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Denver Mineral, Fossil, Gem & Mineral Show 2023
Top Trilo posted a topic in General Fossil Discussion
It’s that time of year again, Denver Fossil Show time, still open ‘til the 17th. This being my 3rd time visiting, I felt I had a better idea of where all the dealers are, and what I wanted to see most. I go mostly to look at all the interesting fossils from all over the world, I saw dealers from every continent other than Antarctica. The show contains a lot of polished minerals and gems although it seemed like there was an ammonite at every table. The majority of the fossils available came from the United States and Morocco. There were plenty of stunning dinosaur bones and trilobites, fish and ammonites but as always there were many, many, fakes, composites, and poor resto jobs and whatever the weird scorpion things in the first image are considered.
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The following are some fossils I found by Tampa Bay Florida. I'm not really looking for info on the low grade fossils. I was hoping for help determining the red /orange mineral under shortwave 254nm UV light that does not show up using 365nm longwave. White or off white under white light. The last picture are slices to show it can run through the piece of rock.
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I found this near my home in Georgia. I'm thinking it's petrified wood, if so what minerals have taken the woods place?...
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Several finds off Lake Ontario (I’m clueless) - any help would be great!
pepperell posted a topic in Rocks & Minerals
All about an inch except for the first. 1. 2. 3. 4. 5. 6. 7. 8. 9. Thank you!
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I want to let everyone know that this upcoming weekend is going to be Gemworld 2023. This show is hosted by my local club, The Gem & Mineral Society of Syrause. If anyone happens to be in the area this weekend you should stop on in. I also wanted to show you all an old find from I believe Spring of 2015. Over the years I have found quite a few good size Dipluera dekayi trilobites. The one I will be posting pics of, is the only one left in my family's possession. I gave it to my oldest Son, who in turn gave it to his Sister. I got it from her last night as I am putting together a trilobite display for the show and will be showing this off. Right now with some cephalon and pygidium missing it measures 6 1/4 inches long with missing parts it would be about 6 1/2- 6 3/4 inches. I am really looking forward to the show and hope some of you can make it.
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There's yellow spot on the rock which makes me curious what kind of mineral is it
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A friend of mine picked this up from a rock shop while in doing field work in Nebraska. More than likely this mineral was not originally from Nebraska and we have no real provenance nor any name for this pretty blue-green crystalline mineral. There seems to be some overgrowth by some flattened rectangular crystals that may be unrelated to the blue-green crystals or they may simply be lacking the element (copper?) that are giving some of the crystals that unusual coloration. Hoping this is a common enough mineral that it will be somewhat easy to recognize and identify. Cheers. -Ken
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Bought this yesterday, what are the rocks in it? Thought it might be "African Turquoise" (so a type of Jasper), but some more information: -Beryl scratches it -Quartz very lightly and superficially scratches it (which is why I am confused, cause I was pretty sure it was the Jasper type mentioned above? I did scratch it with a sharp quartz point though, and it left a small barely visible scratch. Thoughts?) - It seems to not be able to scratch Turquoise, but hard to test as they are beads. I think the color and pattern is odd for turquoise though, even for a low grade one? - I dipped it in acetone and no dye came off. Any ideas? It bugs me that I can't identify it. Would really appreciate your input thanks!
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Good Evening, I have this mineral that I purchased at Johnson's Rock Shop in Indian Springs, Texas. There was no information on the piece, but the price was right... The whole piece is approximately 14 cm by 14 cm. The individual crystals are approximately 1 cm across. Could anyone help me identify this? Thanks... Daniel
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Not sure what this rock is, if a mineral or also a fossil. Found near a lake near Odenwald, Germany. Put up a picture of what the sign says about the rocks found there. Thank you.
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What crystalline mineral is this echinoid test made of?
TylerD posted a topic in Questions & Answers
I found this Coenholectypus echinoid in the Mainstreet Limestone in Fort Worth, Texas. Unlike the heart-shaped echinoid that I've found in other formations, these type echinoids' tests appear to have fossilized into a dark crystalline mineral. I'm not quite sure what mineral this is, and hope that it doesn't react to acids so that it can be acid prepped. It can be hard to see in the image, but on the edge of the fractured test you can see that it's made of a dark mineral with a reflective shimmer. I'm not sure if it is just calcite with impurities to make it that color, but of the 5 specimens of this genus, the 3 that are also crystalline have the same coloration.
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No Fossils in Hidalgo County, New Mexico But Still a Successful Trip
minnbuckeye posted a topic in Rocks & Minerals
A few weeks ago, we accompanied my daughter to Dark Skies, New Mexico, Though the trip was to primarily be an astronomy/ star gazing trip, the day was left open for me to explore the rock formations of Hidalgo County. My goal was to find a fossil in the Pennsylvanian strata or Cretaceous Johnny Bull Sandstone scattered around the facility we were staying at. Unfortunately I failed, but did manage to drag home a few rocks. I wish we were a little closer to @PFOOLEY's neck of the woods!! Most of the samples collected came from the middle tertiary mineral veins emplaced in the volcanic rocks. A view of our little oasis in the middle of nowhere! Volcanic intrusions into the uplifted sedimentary rocks can be seen in the background. The long gently sloping ridge behind the facility was made up of quartz and quartz crystals, It was hard to find samples small enough to bring home! Behind the mountain in the foreground, bands of calcite occurred in the sedimentary rock. Over the second mountain is where the copper associated minerals, Malachite and Azurite, were found. In the next two photos, what is the yellow mineral present? Limonite?? Banded jasper was found close to but not associated with the quartz location. I will tell about star gazing in the astrophotography section a little later.
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Sorry for posting repeatedly about mineral identification! But I have yet another mineral to identify. There's this deep green, glassy mineral in matrix and I don't know what it is. It probably comes from Africa. Unable to narrow down the location. My first thought was Tsavorite but I saw online a piece of Chrome Dravite that looked exactly like this, including the matrix. It's hard without seeing the formation habit of the crystal. Any ideas?
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I am pretty sure the brown-ish large crystal is garnet and the purple is fluorite (?), but what leaves me confused is the round barrel like brown tubes in it. I haven't seen it before, any idea what it could be? It seems like a mineral wrapped in something around it. Thank you!
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I'm sorry for the blurry pics, I don't have the specimen with me and my mom had to take these pictures. I have this mineral, and am not sure if it's black tourmaline or aegirine. The cross section of aegirine should be square-ish and black tourmaline's should be triangular and bulging. I'm looking at it and I still have no idea. If someone has experience and can separate the two, please let me know. Don't know the location.
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what is this large rock that I came across in the creek today ?
matthew textor posted a topic in Rocks & Minerals
Hi everyone this is matt again can anyone tell me what kind of rock this is that I found in the creek today ???
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I have a small 4” tile saw, but and looking for something bigger. Given the blade can be changed for rocks, is there enough of a functional difference to justify buying a dedicated rock saw versus a tile saw? Is lack of power for bigger rocks a consideration at all on the tile saws? thanks
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Another strange mineral to ID ,i would be very happy to put a name on it,regards
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