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d_day

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d_day last won the day on November 18 2015

d_day had the most liked content!

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About d_day

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    Old Gold, Old Rocks, Old Cars.

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  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.
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