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Showing results for tags 'pyrite'.
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From the album: Late Jurassic bivalves of European Russia
Ulyanovsk Oblast -
From the album: Late Jurassic echinoderms of European Russia
Ulyanovsk Oblast, Kimmeridgian, 2 cm -
From the album: Late Jurassic plesiosaurs from the Volga
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From the album: Late Jurassic plesiosaurs from the Volga
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From the album: Late Jurassic plesiosaurs from the Volga
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From the album: Late Jurassic plesiosaurs from the Volga
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From the album: Late Jurassic ichthyosaurs from the Volga
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I was in Sylvania OH this weekend and among many other pieces, I found these. I finished prepping them as soon as I could. The first is a pyrite paraspirifer bownockeri.....it is perfect, not a blemish or chip. This one is a paraspirifer (I think) but different. About 2 inches across. Has a few flaws. Then there is another pyrite bownockeri, same size as the first one, nearly perfect but for a chipped "wing" and a hole. But the hole exposes that it is also a geode....containing calcite I believe. I've never seen or heard of a geodized pyrite fossil. Does anyone have one?
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Simple question. Would the application of Butvar B-76 prevent pyrite disease??????? I hope so. I just applied some to the pyrite I collected from the Pella beds, Pennsylvanian of Iowa.
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Hi all, I recently acquired the below fossil, a pair of articulated jaws, purportedly from Pachystropheus rhaeticus, still with teeth, found at Garden Cliff/Westbury-on-Severn. Whether I wasn't paying proper attention when I bought it or just hoping there wouldn't be any pyrite on the piece, when I received the specimen it turned out that there are quite numerous pyrite-crystals growing to the side of the fossil. As it's quite an unusual piece that I'd rather like to keep, I'm now looking for people with experience with pyrite from the Garden Cliff location. In essence, I'd like to ask how stable the pyrite from this location typically is: whether it decays into a black oxidation product or starts blooming with time. How concerned should I be about the stability of this piece? The pyrite itself looks relatively clean right now, so I'm thinking the rock on which the fossil sits hadn't been exposed for too long. But any advice would be welcome. @Welsh Wizard @Pterygotus @DanJeavs
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Hi guys, I’ve done a bit of prepping of this ammonite I found in Salwick Bay, Yorkshire a few weeks ago and have no idea what it is. There are two obvious tubercles and there may have been more but as you can see it isn’t in great shape..
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Found this at the Monroe Reservoir in Indiana on Monday. Looks like a brachiopod made of pyrite? Or is it more likely a cast?
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Back in Oct. the Dayton Gem and Mineral Society had a field trip to the St Paul Stone Quarry in IN. Waldron shale. I've been slowly prepping my finds (along with other stuff) and finally completed my task. By far the most different piece I've found in a long time....a Rafinesquina-type brach covered in a bryozoan, with a Calymene face sitting on top, surrounded by pyrite. Size = 1.5" W x 1" D x 1" T. A complete, 3/4 prone Calymene. About 1.25" long. Some complete gastropods, all whose brown "shell" is pyrite. Some gastropods that aren't pyrite. A few brachiopods. Some crinoid calyxes. #7 Some some small pyrite brachiopods. And some tabulate corals.
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What's covering my plesiosaur vertebra? How to clean
pachy-pleuro-whatnot-odon posted a topic in Fossil Preparation
Hi all, I recently decided to buy the below plesiosaur vertebra after having seen it for a long, long time. It dates to the Callovian of the Oxford Clay and was found at Peterborough. I suspect it may be attributed to Muraenosaurus leedsi, as it comes from a cryptoclidid plesiosaur, but is both larger and more elongate that the typical Oxford Clay Cryptoclidus vertebrae I'm familiar with. Supposedly coming from an old collection, it has a blackened exterior that doesn't cover the entire piece, with the more common buff colour visible underneath. As such, I expected the dark colouring to be simple dirt or may be some kind of consolidate that could be removed using acetone to leave a nice and clean looking vertebra in its place. However, since having tried acetone cleaning, the dark colour doesn't come off - suggesting that it isn't surface dirt and any consolidate, if present, is not soluble in acetone. I've also noticed that the black colour doesn't spread equally across the vertebra, which is most noticeable towards the top on the front face (first image) where one half of the vertebra is buff, the other black, with a hard separation in between. As this mottled pattern can be seen in other places on the vertebra as well, I thought that, may be, the vertebra might have been in a fire and have become covered in soot. I find additional support in the latter hypothesis in very brittle pieces of bone in one or two spots, with a charcoal-like grainy texture. Lastly, then, I've spotted a tiny edge of yellow staining/infill in an area where the vascular structure of the bone is exposed, with some white infill in an area adjacent - which I've now started worrying might be pyrite. My questions to you are: Origin of the blackening: Does the black clouding of the vertebra look like natural preservation? Related to the above: could the black clouding be due to pyrite decay? In contrast: could exposure to fire cause the clouding pattern seen on the vertebra? What consolidate might have been used to result in such colour patterning? Cleaning: Is there a way to remove soot from a fossil? Has anyone tried? Other than removal by acetone, what other ways might I try to remove an old, darkened consolidate? In case of decayed pyrite, I don't think there's anyway to clean the surface, other than, may be, through careful sandblasting, is there?
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Hello everybody! In continuation of the Frozen Fossils and Frozen Fossils II topics this report covers fossil hunting in real winter, with excavating fossils from under the snow (@JamieLynn might be interested). The trips took place this week when we had a thaw with temperatures raising to +1-2 Celsius after a long period of frost (so that digging became possible). This time I visited the same site as in FF2, which is MUCH poorer than the one covered in FF1, but MIGHT yield more diverse fossils (which was unfortunately not the case).
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These are two of my favourites, which I have been working on with my dremel to remove matrix. Parts of both show a fantastic golden pyrite. Sorry the pics don’t show it too well. I suspect the gold is fading however. A few questions: 1. Can I do anything to bring out the gold? Would polishing with a wire dremel head help? 2. What can I do to preserve the gold? Should I coat/seal them? Thanks in advance!
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Ive seen pyritized plueroceras ammonites that look golden, like this one, but there is also this one that is the same species from same location with same pyrite but not as shiny, is the difference just one is polished and one is not? Thanks for the help
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I’ve been slightly obsessed for a long time now with finding a Whitby cannonball nodule good enough to put the hours of prep work into. I have given up while trying to split many, I have split a lot of empty ones, I have chipped a load while trying to split them. I do have a nice eliganticeras nodule that could potentially polish up but the shape just doesn’t lend itself. I found this at the weekend at Runswick Bay and while it would have been nice to have a split nodule with the positive and negative, I could see the potential in this. The actual ammonite is just a crushed up pyritey mess, but there’s a lovely shiny impression lurking below. So far I have uncovered around half of the impression on top and polished up a very small patch on the side, but it’s slow going. I’m trying to avoid using any power tools for the polishing (because dust) and have a decent selection of wet and dry paper (down to 600 grit). I was wondering if anyone with experience of these cannonballs could tell me how fine you need to go with the wet and dry to get a really nice shine, or if there’s something beyond that I should use?
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Found on limestone river bank in Alabama. There were fossils nearby (shark teeth, shells, some kind of vertebrae) but not exactly where these were found. Can’t see in the photo but there are tiny gold looking flakes in it.
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My grandmother (rest her soul) was a high school science teacher way back in the day. She was also a SERIOUS rockhound. These days her extensive collection of odds and ends lives in the family attic. I was going through some of the boxes when I stumbled on this gorgeous pyrite encrusted brachiopod. Unfortunately many of the tags and labels for her pieces haven't survived into the present day, so I've been curious about what species this is and where it might be from. I've heard that Ohio has a deposit with lots of pyrite fossils and brachiopods. Anyone know of any other places where such a fossil might have come from, or is Ohio the most likely?
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Hi there, I found this specimen on a hike outside of Denver, Colorado. It was laying in the middle of the trail. It’s about 10cm long. It has grain that looks like wood or layers like mica. It’s also gold and shiny like pyrite or mica. It’s layers are wavy and it leaves a gold dust behind when handled. It’s stunning when the light hits it. Hoping to identify what it is. Thank you! Lisa
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From the album: Plants of the Lewellyn Formation
Leaf cast with iron oxide coating left by the plant itself Columbia County, Pennsylvania Carboniferous Lewellyn Formation-
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Pyritized brachiopod from the Kalkberg Formation
Nautiloid posted a gallery image in Member Collections
From the album: Lower Devonian Helderberg Group in Eastern NY
Leptaena rhomboidalis Lower Devonian Helderberg Gr. Kalkberg Fm. Rickard Hill Roadcut Schoharie, New York Collected 5/31/20 -
It appears to me as a pyritized wood, it gave off the metallic sheen when it's under the light. Pyrite/marcasite are abundant at where I found this and it's from Kiowa formation (Albian). Kiowa formation is primarily an estuarine and shallow sea environment, fossilized wood and plants are occasionally found from there. I found it as a concretion but it crumbled into tiny pieces when I pulled it out of the ground, so this one is the largest and only piece I have now. Do you think it's a pyritized wood?
