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Hi. Can anyone help to identify what this item is at all. To me it looks like there are three straight lines which tape from right to left and fanning out in the same direction, what appear to be some sort of lines. These lines are visible both above and below three straight lines. It was found on a beach at Corton, Suffolk.UK

I will try to get the front and back pics attached. Does anyone know what this is?

This stone is the centerpiece of the mantle above our fireplace, and we've always wondered what kind of fossil this is. Our house is in Los Angeles, but I don't know where the stone is from. It looks like some kind of lizard with fins for feet. It's about 12 inches from head to tail. What do you think this is? Full view: Close-ups:

Hello all. This is my second post, so still a noob. I'm very happy to have found this forum to help learn about fossils and preparation - I've already read a lot of very helpful information. I've recently purchased and prep'ed my first fossil - a prisca from the green river formation. It was a lot of fun and good practice. I then purchased a large Diplo and have started working on it. So far the diplo (which is much larger) seems more delicate - fine bones and very thin tissue between the bones (ribs?). But so far so good. The only area on the prisca that didn't turn out great (for a first attempt) was the fins. And when I say not great, I mean really, shamefully bad. They are so delicate and fine that by the time I got to the tips, I was regularly scraping them off while trying to scrape off the matrix - even while being very careful. I never got to the fine, almost hair-like splits of the end of the fins. As I start on the Diplo - I've reached the point that I need to address the fins. I really don't want to screw up the fins on this one - I'm really hoping it will be a display fossil. I'm using a pin vise and carbide tip (from Paleotools) and I'm using a magnification visor (2.5x I think), so I have a good view when I blow it. If better tools will help, I'm open to that. But I have a feeling it's the user, not the tools. I can't imagine a vibrating tool like a dremel or scribe doing better on the delicate fins. Any advice? I've tried using a gum eraser - and that works if there's just a haze of film left, but doesn't seem to take off a layer. I've also tried using vinegar to weaken the matrix. That also seems to help, but not solve the problem - and I worry it will weaken the fossil. Thanks for any input/guidance. Jason