nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Oct 1, 2017 9:11:59 GMT -5
Spent about 4 hours searching lake superior a few weekends ago near Duluth and nothing but tiny stuff(it was pretty windy though, so no water searching). Go out about a mile from my house after I get back and find this in about 30 mins, go figure. Painter with a fragmented membrane I believe(1lb+). It's pretty much completely unbroken so unknown what's on the inside. Lakers never cease to amaze!
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 22, 2017 17:15:50 GMT -5
Tiffany Stone, maybe? REmember I bought a small strand in the 1990's and it was expensive. I looked that up and it appears that a lot of it fluoresces under UV(radioactive!), so if you have a black light that might tell you. On a side, I also learned that some of the agates that I picked up out in Wyoming probably have uranium in them!
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 22, 2017 16:02:29 GMT -5
kinda looks like a fluorite matrix of some sort
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 14, 2017 14:33:55 GMT -5
That is cool! The second photo looks like a tooth, but. After seeing all the photos, maybe bone? How hard is it? Does it appear less yellow/orange in person? I don't think it's that hard. Steel scratches it. It's also semi-translucent. I'm no expert on bone, but I've never seen any with that kind of patterning. I'm still betting on some kind of sea creature with some of the patterning. I just don't know how much detail has been lost through glacial action and polishing. It vaguely resembles a horn coral, maybe? The color is more white overall, but the lines are yellow-brown. Picture is pretty close, maybe a bit dark though.
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 7, 2017 19:05:23 GMT -5
They all appear to be chalcedony of some sort. Some have the look of silicified sea critters(coral etc), but I'm still figuring all that stuff out and am definitely no expert in that area.
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 7, 2017 18:55:01 GMT -5
What does it look like wet?
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 5, 2017 21:22:35 GMT -5
I guess they don't need date #2
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 5, 2017 17:38:47 GMT -5
No, but I wish she were. Sanza Stark? Sure, okay. It does kinda have that look. Had to look that one up, lol. Game of Thrones, should have known. I am clueless about fictional characters in that medieval make-believe crap, not my cup of tea. NTM, I don't have HBO!!! Better things to do than watch the boob tube. It was just a book before tv ruined it. I suggest reading it, but wait for GRRM to finish writing the series before starting it or face waiting ~10 years between new novels like the rest of us ....
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 5, 2017 16:03:37 GMT -5
So you think it's one big coral? Are those spheres common formations, nodules of some sort?
I've found tabulate coral fossils(foerstiphyllum vacua) around here before, but not this.
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 5, 2017 15:18:19 GMT -5
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 4, 2017 8:53:36 GMT -5
Looks kinda like some of the granite we have around here. Maybe with a big quartz seam running through it?
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 2, 2017 17:59:46 GMT -5
Thanks. I probably have identical stuff across the border here.
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 2, 2017 17:27:02 GMT -5
A book I have says there is fluorite in the far northeastern tip of MN along Lake Superior(north of Grand Marais). It's probably scattered around from glacial activity in the area, just like all the other rocks I find. I'd venture a guess to say it's probably not that common though.
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 2, 2017 16:24:07 GMT -5
I don't have a macro lens/mode on my camera so that's prob the best picture I can get you. Wasn't really concerned with what it was, more what was making the green coloring. If it is a laker it's probably the strangest one I've found. Thanks though!
Also, the first two are definitely something copper related. I can see flecks of copper in the first one for sure, but half of it appears to be calcite crystals(dissolving) and the other half green crystals. They are pretty hard so I doubt they are chryscolla/malachite, maybe some copper stained quartz.
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 1, 2017 16:04:12 GMT -5
Yea it's sometimes hard to tell when something might be crystals with glacial activity wearing it down. Most of it is definitely ground down but in the crevices there are some completely flat crystal surfaces. I don't see any fortification banding on last one. It's more like a squiggly line with some random imperfect circles thrown in. I guess it's possible it is a laker with some kind of strange plume/mossy formation. I've never seen anything quite like it though. I'll see if I can get a better picture and clean up the crystals. Update: The first one with the square crystals definitely has some calcite on top that is dissolving away rapidly. I'm pretty sure I can see flecks of copper lodged in it as well. I'll let it soak a bit more and see if it's any clearer. The 2nd one sat for a while and didn't get any clearer/cleaner so who knows.
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Sept 1, 2017 15:12:57 GMT -5
Found some material recently that has a green(some blue) tinting and I was trying to get some ideas of what it might be. I started thinking it might be caused by copper and might be malachite. The malachite I've lookd up seems like a much darker color so I was wondering if this is maybe quartz with some copper staining in it? Fluorite maybe? Also, are these crystal formations on the first one normal or is it likely that it's a fossil of some sort? Fluorite forms square crystals I guess. The 2nd piece has a blue tinted strip a few mm wide which may be a separate material. The white crystals are brittle or glacially broken, but the green material isn't and doesn't scratch. The third picture has a lot going on. It appears to be fossilized algae(jasper/chalcedony), but it also has some greenish tint in some areas. It's probably a different material from the first 2 though. Olivine maybe? All three are from central MN glacial till. Right click images/open in a new tab for full size or go to full imgur album: imgur.com/a/4SANo. #1 #2 #3
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Aug 31, 2017 20:01:37 GMT -5
I looked it up and I think unakite is technically a granite, so that's probably accurate. For some reason I always assumed that it was only found in the great lakes region but apparently that's not true.
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Aug 31, 2017 19:38:44 GMT -5
Is that crystals or a fracture in the 2nd picture?
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Aug 27, 2017 21:56:08 GMT -5
Gonna go with "french onion soup" color.
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