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fuss

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  1. Ivigo, If I were you, and was this intrigued by this rock, I would have it taken or sent somewhere for testing. That will be the only real way to satisfy your curiosity.
  2. I'd guess one of the Amphibole asbestos minerals based on the photo.
  3. could be a pyrite nodule, try scraping it against an unglazed white tile or the underside of the toilet tank lid and see if it leaves a mark (streak) and note the color of it. Pyrite would leave a black greenish streak.
  4. Chert nodule would be my guess.
  5. A few images from my collection. The first two images (same rock) are from Nelson Co. VA. I have another with inclusions of Rutile from that location. Both I purchased from a dealer in the mountains out there. The third image is one I found in northern Wisconsin in Langlade Co.
  6. Look at #17 on this list.I have a few samples one from VA and one I found in WI, Ill snap some pics in a bit and post. https://www.dmme.virginia.gov/dgmr/pdf/vamin/vm 48_2_3.pdf and this. http://geology.blogs.wm.edu/minerals-rocks-and-fossils/minerals/
  7. Looks like they turned out pretty nice. As far as jasper goes I would say #3 could be, but the other three look more like some kind of granite type rocks.
  8. The grey looks like it could be chert. Have you tested for hardness?
  9. d-day is 100% correct, these are very abundant along lake Michigan shorelines. Chrinoids, Favosites and several other things cemented up in limestone.
  10. My thinking is a basalt with a higher magnetite content. Try the streak test like Bob suggested.
  11. Actually a great find for southeastern WI, if you had said northwestern WI I would not have been surprised but these are few and far between in the SE part of the state, what town? Value is like what was mentioned above though.
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