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Found 11 results

  1. Polishing Ammolite

    I stubbled on a few small pieces of ammolite while out fishing. I have searched the internet and this forum for information and have come up with several different ways to clean and polish ammolite. However I have not been able to find a detailed process from start to finish to get ammolite looking it’s best. I know there are different qualities of ammolite and some require little to no work but mine needs some work to get it to look good without getting it wet. I have tried sanding for quite a while up to 600 grit paper. That’s the finest I could find but now have found up to 3000. Should I just keep going with the sanding? Is there polishing or buffing to do after the sanding? Is there an epoxy to put on after to keep the wet look? Any information would help and I thank you in advance. I just want to do it right the first time so that I don’t wreck it or have to go back and try to strip off something I put on.
  2. Greetings from Central PA. I'm a total noob when it comes to fossil prep. Today I have a flattish piece, about 10" across and 1" thick. It from a large outcrop of wavy laminations that I believe are from a Keyser Formation stromatoporoid. It's pretty weathered and too hard to tell if pillars are present. So I'd like to try to grind/polish one edge. I have a good collection of metal and woodworking sanders and grinders available but nothing specifically designed for rocks. So my QUESTION IS.... is there a reasonable way to grind/polish the edge of this sample to look for stromatoporoid pillars? I'm just guessing that false negatives are common doing this sort of thing. so I thought I'd seek expert advice before I just make up some hatchet job only to get iffy results. Thanks
  3. I recently acquired a small Araucaria cone and I am wondering what the general opinion on cutting/polishing fossil pine cones. Should it be cut to show off the internal structure or is it best to just leave it as a whole specimen? How do you feel about modifying fossils in general to enhance aesthetic, rather than scientific, value? I am interested to hear the Fossil Forum's opinions.
  4. Nautilus Polishing Advice

    I bagged a couple of Nautilus while down at Lyme Regis recently. The one on the left will be a reverse prepper and still has its shell on which is a joy to see. The other is a polish job, I have a vague idea at how to do it, although I’d appreciate if anybody could give me a rundown or step by step guide on how to get it gleeming, as it’s not something I want to go in blind like I usually do. I’d appreciate any advice. Thanks.
  5. polishing some of my Goniatites

    I recently got a new job, and to make things even better, my job is at a company who processes and places floors and walls in stone, mostly marble. This opened a few opportunities for me , having access to a huge amount of polishing and cutting tools, so this week I gave it a try: I took 2 of my Goniatites that weren't of top quality, or to hard to prep. and today the helped me to cut the fossils and polish them. The fossils turned out really well here are my first 2 polished Manticoceras sp. from the Frasnian layers of Lompret in Belgium: before polishing them: after cutting and polishing: top goniatite: Bottom Goniatite: both of them: And a question for the moderators: the fossils have been cut and polished today, but were found earlier this year, are they valid entries for FOTM since al the cleaning , cutting and polishing was done now? Thx Kevin
  6. Surprise amber!

    So yesterday I went with my mom to the mountains to have some quality time and rock hound. One of the shops we visited allowed you to buy a bucket of sand filled with fossils and sift through it. We gave it a go, found some stingray barbs and a few echinoids. My favorite piece was a tiny piece of amber because it was my first amber acquisition. Well just this this evening I was going through my finds and I noticed a large rock I collected. It appeared black and was very lightweight so I thought it was some kind of charcoal. Then for some reason I decided to shine a light on the piece and the piece started to glow a beautiful orange color. At that moment I knew I had a piece of amber, and it was a piece that is significantly larger than the other one we found. You can see the piece is rough and it only gives off an 'amber' color when a light is shine through it. I used some 150 grit sandpaper to try polishing the piece but it really didn't help. I guess my question is: how does one polish amber? I'd love to give polishing this piece a go because I think there may be some inclusions.
  7. Polishing Some "Chunkasaurus"

    I had to listen to a couple lectures for a school assignment which ended up totaling over 2 hours of straight listening. I cannot just sit and do nothing while I listen so I decided to do a little fossil prep. I have had this piece of what is commonly called "chunkosaurus". Chunkosaurus is a chunk of dinosaur bone that has no defining features and many times doesn't have a location attached to said specimen for us to assign it to a species or genus and so is almost practically useless to scientific endeavors. But I saw a future for this little piece so I downloaded my lectures into my phone and grabbed my stack of various sandpaper grits. I started with the opposite side looking like this. First up was some 380 grit paper to get rid of the obvious saw marks the seller I bought it from had left. Here is right after I got done with the 380 paper. Most of the saw marks except for the absolute deepest ones were gone and a little shine was showing up. I then moved onto a intermediate grit around 500 I can't tell for sure as it was old and faded on the back but I could tell the approximate grit from feeling it. This paper promptly fell apart but I got the results out of it I wanted. I then moved up to a 1200 grit then 1500 and finally 2000. I forgot to take pictures as I was getting excited to see it start to gain a mirror finish. My lectures had drawn to a close so here is my final product. Please forgive my photography, my camera is acting wonky.
  8. A slice of life...

    ...or at least it used to be alive. A friend of mine offered to give me a few of his unprepped ammonites in exchange for a bit of work for him. He asked me to cut, sand and polish a Macrocephalites ammonite for him which he suspected might show some nice interior designs. And he was right. I only took a photo of it moistened after cutting and before sanding and polishing and didn't think to get one of the end product before I gave it back to him, but I think you can already imagine how nicely it turned out in the end, don't you think?
  9. Hi everyone I recently got a large sandstone block (~20cm x 20cm x 20cm) which is like a shell deathbed (see pics). There's a layer of weathered material on the surface but underneath it's a nice piece. I was wanting to try and clean it up and do something nice with it. My ideas were to either (1) square it off and polish the block or (2) Square it off and slice it into multiple thin slabs (maybe 2-3cm thick) which could then be polished. I'm not sure if it's bad practice to slice up a fossil or not. Anyway, I was hoping someone might be able to give me some advice on what tools would be appropriate for cutting a block this size or how to go about polishing the block afterwards. Alternatively, if anyone has any other cool ideas for it I'd be keen to hear them. Any advice would be really appreciated! Cheers
  10. Petoskey too hard?

    HI there, I recently found a Petoskey Stone among others on the same tiny (12 foot) beach in Mid/Upper Michigan, as I have for years in the same location. Only...this one's different. I can't seem to polish it down entirely by hand OR with a dremel. It has a lot of beveled structure still compared to others I've seen, and it just feels HARD. There also seem to be tiny crystal bits in some places. Can Pestoskey Stones (limestone as I understand it) harden into Travertine or Marble and retain their distinct pattern and shape?
  11. How to polish amber?

    Hello, New to this forum. I recently have developed an interest in fossil inclusions in amber. After buying a number of prepared pieces, I decided I would like to try my hand at polishing some of my own. I found myself the owner of several hundred pieces of Dominican amber with inclusions. I have been doing a wet sand, and feel like I am close, but the pieces just don't seem to be getting a nice clear transparent finish. Any tips for finishing? I attached a few photos, the piece with the winged ants is from my collection and was polished by someone else, just for contrast with the one I was working on. I have a few pieces that look like they may have rarer inclusions (one looks like an earwig), so I am hoping to perfect the technique on a few more common pieces before I try my better ones. Thank you! Nathan