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Posts posted by Haderly

  1. On 9/30/2020 at 9:28 AM, 4meter said:

    I think it is a sandstone with desert varnish on the outside.   The "varnish" has been mechanically worn off producing the "tiger strips" pattern.  Neat find!

    Desert varnish = a chemical weathering process that produces a dark "rind" on the outside of a rock, exposed to a desert/semi desert environment. 

    Definitely not found in the correct environment for desert varnish and being found in an active river would obliterate desert varnish. Could have an oxidation rind but I would not wager on it. Based on the geology of the area it is likely an odd ball metamorphic/igneous rock.

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  2. Picture is really small but it look like it could be one of the Brecciated Jaspers from California (Stone Canyon or Stoney Creek). Color is right but it appears to have a lot more chalcedony than normal…which is a good thing.

  3. Smelter glass. I have some from a few different iron smelters. One common one in the US is "Leland Blue" from Leland, Michigan. If you google Leland Blue you will see a lot of similar examples. I have some that supposedly came from a Viking smelter but that could just be a good story. 

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  4. I would get it in front of someone that knows fire agates. You can waste a lot of time for no reason or destroy a great stone. Anyone that has carved fire agate will be able to let you know if it has potential. It is very uncommon to know how much potential without starting to grind it with diamond bits. Without being specific can you let us know the general region you found the stones. True fire agate is not very common and I don't know of any of the areas that are associated with gold however there are lots of areas with brown chalcedony.

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  5. On 1/11/2020 at 6:25 PM, FlakMagnet said:

    AuSeeker, thanks, I think I will wait awhile, although I do have a meteorite. I was enthralled with the video though. Imagine having a ring like that; otherworldly for sure.

    David – you need to make your own. You don’t need the fancy equipment. I made one for myself using diamond core bits, files, sandpaper and diamond polishing compound. Just go slow and take your time. Mine turned out great but should have made a wide band like the one in the video.

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  6. I am betting that it is tar and what you are seeing in it got mixed in from being on the ground. Does it have a smell? Put a torch on it and see what happens. I know someone that collected a bunch of what they thought was obsidian. It was rock hard in the winter but as soon as the Arizona summer hit the rocks started to melt. He had collected a bunch of roofing tar that had been discarded. What he had was identical to what you are showing including the impurities in it.

  7. 18 minutes ago, dsvilko said:

    Yeah, but which one?

    If I get anymore specific I will truly show my ignorance of meteorites. If I was forced to guess it would be Tagish Lake or Allende but I doubt either one is correct since you have posted a lot of NWA meteorites. Maybe a NWA 8534 since there is no size reference and could be a very small piece...so that is my final answer.

  8. 12 hours ago, d_day said:

    I’ve never seen or heard of jointed basalt forming in such small pieces. I think it’s far more likely to be a hematite after pyrite concretion. The smooth shell breaking away to reveal the interior is pretty indicative of a concretion.

    I agree. Ohio has a lot of concretions and this one looks to be a classic formation. 

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