Loren Booda
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Please forgive the diversion, but how much are meteorites worth?
Loren Booda said:Please forgive the diversion, but how much are meteorites worth?
zoobyshoe said:The third possibility that remains in my mind is that they might be some form of old foundry waste. That's why I brought up cast iron before and why I asked if you'd gone out hunting again. The more you find that you're sure aren't natural ores, the more likely it would be you're downstream from some old foundry. The further back in time you go the more irregular in composition the "slag" from such a foundry might be, with each frontier cottage foundry having more and more of it's own idiosyncratic "recipes" and procedures. With the flooding carrying things far from their source, they might be slag from a foundry 50 miles upstream that went out of business in 1824.
You're right about the magnet if it were pure cast iron, but by "foundry waste" I meant some kind of slag: what they skim off the top of molten metal before they pour it. This would not have a high iron content.Ivan Seeking said:Something manmade seems the most likely alternate explanation. However, I know where the headwater is for this creek - it's only a few miles up in the hills - and there is nothing like a foundry between here and there, and never has been. I could see the possibility of an old abandoned mine being in the area but don't know of any. The other problem is that I would expect a higher density for any kind of alloy.
Another clue suggesting they are meteorites is that they are ferromagnetic, but not strongly so. If it was a chunk of metal, I would barely be able to peel it from the magnet.
zoobyshoe said:You're right about the magnet if it were pure cast iron, but by "foundry waste" I meant some kind of slag: what they skim off the top of molten metal before they pour it. This would not have a high iron content.
I'm not sure you can be 100% certain there was no one casting iron in the area, ever. A local farrier or blacksmith might have had a side line casting plows or skillets, or bootjacks, or ornamental door knockers for that matter.
The reason I'm going on about this is that, while you say they didn't fail the streak test, they also didn't pass it. A meteorite should leave no streak. And, as you pointed out, you found two within a short distance of each other, which is unlikely for meteorites.
PAllen said:Don't know if this has come up, or is practical, but if you cut off a slice with a diamond saw, and grind on a lap with fine grit, nickel-iron meteorites look pretty distinctive. Of course, I (long ago) had all this equipment for gem cutting. Presumably, you may not have ready access.
zoobyshoe said:while you say they didn't fail the streak test, they also didn't pass it. A meteorite should leave no streak.
http://epswww.unm.edu/iom/ident/index.htmlA meteorite, unless it is very heavily weathered, will not leave a streak on the tile.
That's the thing, yes. They don't explain much about the "heavily weathered" possibility, what kind of streak that would leave, what other features it might have, how common it is.Ivan Seeking said:I meant to respond to this. Well, yes and no.
http://epswww.unm.edu/iom/ident/index.html
Is this heavily weathered?I interpreted the result to be indicative of something other than magnetite or hematite, but not definitive or strongly suggestive of a particular answer, beyond that.
arildno said:Why not run the following test, Ivan?
We know, on basis of Netonian gravitational theory that most meteorites go in hyperbolic orbits passing the Earth just once.
Thus, if you just throw your stones into the air, they will follow their natural hyperbolic course if they are meteorites, if not, they will come back down.
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arildno said:Thus, if you just throw your stones into the air, they will follow their natural hyperbolic course if they are meteorites, if not, they will come back down.
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Must be easy. Don't need a blind. Or camo. Probably won't ruin your fender.Ms Music said:Sometimes when I went rock hunting with my dad,
Ms Music said:he would tell me it was a leaverite. As in leave er rite there.
PAllen said:Back in the old days, when hobbyists could readily buy real chemicals, the mineral collector's test for nickel used Dimethylglyoxime. If you can get this it should be very easy to test for nickel.
PAllen said:It looks like you can buy this all packeaged as nickel test kit:
http://www.delasco.com/pcat/3/Self-Help_Products/Spot-Test-P/Spot_Test-P/
arildno said:Your Dad was a wise man, MsMusic!![]()
Ivan Seeking said:Thanks! I was looking around and found one site that says this is prone to false positives. So I guess a negative result is definitive, and a positive result is not. Perhaps cutting it open will be enough to determine if this is anything ineteresting.
PAllen said:It was the standard test by mineralogists, way back when. I think it does get confused with palladium, which might occur in jewelry, but is a very unlikely confusing factor for minerals or a meteorite. If you have any reluctance to cutting it, I would definitely try this first (grind a little fresh surface with alumina or silicon carbide sandpaper first).
zoobyshoe said:Ivan, I just got back from one of my coffee shops where I talked to a woman (of about our age), and I mentioned your quest for meteorites to her. It spurred her into a long reminiscence about her father who was a metal detector treasure hunter freak. She inherited his finds. She said she had at least 20 tubes of silver dollars (she indicated a length of about ten inches per tube with her hands) that he had found. I thought that was a awful lot, and asked where he'd found them. She said he hunted for old farmsteads and scoured them with the detector. Apparently it was very, very common for people to distrust banks and their relatives, and to simply bury their savings around the property in tin cans. Mostly he found cans of coins, but once he found a crumbling can full of two dollar silver certificates. Thought I'd mention it, since you live on an old farm.
zoobyshoe said:You're right about the magnet if it were pure cast iron, but by "foundry waste" I meant some kind of slag: what they skim off the top of molten metal before they pour it. This would not have a high iron content.
I'm not sure you can be 100% certain there was no one casting iron in the area, ever. A local farrier or blacksmith might have had a side line casting plows or skillets, or bootjacks, or ornamental door knockers for that matter.
The reason I'm going on about this is that, while you say they didn't fail the streak test, they also didn't pass it. A meteorite should leave no streak. And, as you pointed out, you found two within a short distance of each other, which is unlikely for meteorites.
Ivan Seeking said:Good point. There was never a large foundry, but there could have been a small operation on a farm. We are just about at the end of civilization but there are a few more farms beyond here.
Wow! They make housecalls.Ivan Seeking said:On the other hand, I just spoke with the professor from the meteorite lab, and he's willing to drive 40 miles to take a look.
He chuckled at bit when I said that recognizing one on sight seems to be an art form. If I grind off a small section to expose the inner material, apparently he can tell at a glance.
zoobyshoe said:Wow! They make housecalls.
This will settle it. If it turns out they are meteorites there may be more. A much larger one might have shattered such that there are more pieces to the puzzle.
If they were two completely unrelated meteorites, that would be some kind of record, to find them so close to each other, and both on your first try.
Has he found any leaverites there??Ivan Seeking said:Okay, I should know by about noon tomorrow. Turns out he has spent many hours doing research-related work in the restaurant I suggested as a meeting place.
arildno said:Has he found any leaverites there??
arildno said:Have you tried my Newtonian test yet??
Wow, I am amazed they're that rare! I thought the odds were perfectly in favor of them being meteorites, what with billions of years of bombardment.Ivan Seeking said:As it turns out, 99.8% of all potential finds are leaverites.
It is some form of basalt. He said the density isn't quite right for basalt so he's not sure of the origins.
A few facts that he passed along: Firstly, had this been a meteorite it would have been a VERY BIG deal. I had no idea! Only six have ever been found in Oregon and the last two resulted in national press conferences. He said that Oregon is particularly tough because we have a lot of magnetic basalts, which can make meteorite identification in the field all but impossible. In fact, there is almost no way to distinguish between magnetic basalt, and a lunar or Martian meteorite. Many times the only way to know it’s a meteorite [without an electron microscope] is if it hits a house or barn.
I guess even the experts spend most of their careers chasing dead ends. But he took a bit of time to show me various types of meteorites that he brought with him. He said that on the average, there is about one meteorite on every square mile of land, but finding them is quite a challenge.
Also, he gave his blessing for the nickel test kit approach. He said they work well and are typically definitive.
For my own purposes, it was noteworthy that the stone meteorites were affected by a strong magnet more than my basalt samples. So this would seem to be a good point of reference. A stone meteorite won't stick to a magnet as forcefully as a chunk of iron will, but the basalt was significantly less magnetic than the real McCoy.
zoobyshoe said:Wow, I am amazed they're that rare! I thought the odds were perfectly in favor of them being meteorites, what with billions of years of bombardment.
Anyway, I think everyone enjoys treasure hunting of one kind or another.
Borek said:If you put strong enough magnet in the creek you can be sure you will not miss any iron meteorites. Nor magnetic basalt.
Did he happen to mention where the most meteorites are found?Ivan Seeking said:Yeah, that was definitely news to me. I knew it was highly unlikely that one might go out and find one in fifteen minutes, but I also was under the impression that if you spend a good amount of time looking, sooner or later you're likely to find one. Not so. At least, not in Oregon.
Seriously, if you have quartz you may well have gold/silver. Of course, it's going to be fine particles, but I think it would be worth it to do some panning.What makes me cringe a bit is to think that for about seventeen summers, we've walked that creek and looked very carefully for quartz, petrified wood, and semi-precious stones. And we've found about five, five-gallon buckets full of those treasures. But it never occurred to me before that we should be looking for meteorites as well.
zoobyshoe said:Did he happen to mention where the most meteorites are found?
No.
[qsuote]Seriously, if you have quartz you may well have gold/silver. Of course, it's going to be fine particles, but I think it would be worth it to do some panning.
Yes, but you said he never got back to you. I, personally, would want to check and see if there is any there at all, even if you don't feel like trying to recover it.Ivan Seeking said:I told you my solution there. I have a guy who will do all the work and split any finds. Trust is an issue, but assuming that can be managed, it works for me. Doing it myself sounds like too much like work and not enough like fun.![]()
zoobyshoe said:Did he happen to mention where the most meteorites are found?
Ivan Seeking said:As it turns out, 99.8% of all potential finds are leaverites.
zoobyshoe said:Yes, but you said he never got back to you. I, personally, would want to check and see if there is any there at all, even if you don't feel like trying to recover it.
Ms Music said:Even if it winds up NOT being anything worth money, don't call it a leaverite! I would still put it on my fireplace mantle in a place of honor. This has been a fun thread to follow, and the rocks would make a GREAT conversation piece. It is far more interesting than MY "meteorite." It looks like a golf ball (meteorites aren't round) and it is non magnetic. But I keep my "meteorite" on the fireplace mantle anyway. Although I can still hear my dad's voice in my head muttering it is a leaverite.
Your meteorites/rocks/whatever don't qualify as leaverites in my book.