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d_day

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Everything posted by d_day

  1. d_day

    Diamond?!?:) Or diamong? ;(

    Not diamond. Might be a little drusy quartz.
  2. d_day

    $100,000.00 Doorstop

    I haven't heard many of these though I'm sure they're out there. One I did experience personally was that my great grandmother used a 40 pound silver ingot as a door stop.
  3. d_day

    $100,000.00 Doorstop

    The Tucson ring and the Carleton were used as anvils for a time.
  4. d_day

    The Opal thread...

    That's pretty much the same thing I've heard.
  5. I don't see anything natural looking about that "rind." There is no doubt in my mind that this is a chunk of glass.
  6. d_day

    Any oppinions on this ?

    Can we get some photos with proper lighting? The poor lighting in some of these photos makes it look like azurite with malachite, and other photos make it clear there are neither of those minerals in the specimens.
  7. "Lighter than most rocks" means its most likely coal.
  8. How hard is it? Is it extremely light, or somewhat heavy? Where was it found? I think it's probably a low grade obsidian, but might also be black dacite, basanite, potch opal (not likely), or anthracite coal. I can narrow it down with answers to the above questions.
  9. d_day

    Green radials

    Small stuff is always so hard to ID.
  10. d_day

    Green radials

    Almost looks like wavellite.
  11. d_day

    Ordinary stone

    The black is obsidian, the grey is perlite.
  12. d_day

    Tusk splinter

    I'm no expert, but it does look like ones I've seen.
  13. Looks like you've posted 4 specimens. Here's my crack at ID. First specimen appears to be bone. Couldn't tell you what kind, but there is too much symmetry for it to be a rock. Second specimen looks like a calcite stalactite. Third specimen looks like a broken agate nodule, but might actually be glass. Something seems off about the luster in the second picture of it. Last specimen is an agate/chalcedony nodule. All are fairly common, so telling you exactly where they came from is t really possible.
  14. d_day

    Rock identification

    No. Concretions form by precipitation of mineral cement around a nucleus, often times a fossil. There are many minerals that form concretions. Among them are limestone, dolomite, pyrite, goethite, hematite, gypsum, and calcite.
  15. d_day

    No Words.....

    Did i see native copper in there?
  16. d_day

    Metal ID

    Looks like two pieces of steel spot welded together. The brown/red streak is rust. The thicker side shows signs of having been cut with a torch.
  17. d_day

    Stinky rock

    Sure looks like slag to me.
  18. Could be schorl, but I think biotite is more likely. Definitely natural though.
  19. d_day

    Drilled Quartz?

    I see no evidence of mechanical drilling which leads me to believe it formed that way.
  20. d_day

    Red

    Edit: sorry, didn't see this had gone on to page two. My comments added nothing new, so, it's gone.
  21. d_day

    Red

    This published reference list many minerals cinnabar is associated with. Quartz is among them. Edited to add: quartz is not actually listed here, but was listed on a site which linked to this document as reference. http://rruff.info/doclib/hom/cinnabar.pdf
  22. d_day

    Red

    If you've got a loupe, take a good close look at the dark red crystals. If you see what look like small beads of mercury, then you've got cinnabar.
  23. Bismuth crystals are square. Chalcopyrite has been known to form triangular hopper crystals.
  24. d_day

    Purple

    Knowing fluorite was on the other side, my first thought was fluorite. Adam mentioned lepidolite, which is possible, but it doesn't quite look right for lepidolite, at least not to me. I still think it's probably fluorite. I could tell you with 95 to 100% certaintity if I had it in hand, but wouldn't venture to give an a definitive answer from a picture alone.
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