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Offline ram
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« Reply #20 on: November 11, 2010, 10:57:12 pm »
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maybe, but it is very sure if you bring that thing to metal laboratory to be identified and w/c is satisfaction guaranteed.

ram,

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« Reply #21 on: November 11, 2010, 11:30:35 pm »
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Of course a metallurgical lab would be able to give a certain and definitive analysis of this lump, but that would take the fun out of it all! Smiley

Attached is a photo of the spot where I tapped it with a hammer (with much less force than one would use to drive a nail into soft wood). No cracking, no shattering or flaking. This stuff is not so hard and is definitely malleable. But pyrites are brittle! Lets see if the surfaces I applied metal polish on will tarnish over time, and to what color; that may provide another clue.

Right now I'm having a flight of fancy that this lump may be the work of some prospector's labors long ago, cooking up the fruits of his labors over a makeshift field kiln a mixture of a very low gold content (which would explain the higher SG, malleability, half-melted parts and maybe part of the color) together with other types of ores he panned out. And then again, it may not contain any Au at all! *POP goes the dream bubble* Grin

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"Gold rides an iron horse." (Old prospector Homefire)

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« Reply #22 on: November 15, 2010, 06:54:44 am »
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OK I  realize you don't want to reveal the actual location where you found it but

Was near inhabited area?  Was it near any factory or other activity where smelting or slag might have ben produced? Are there more of these about?

Time to take a of it useing a diamond bladed saw...  This will give yu a composite.

Your high resolution images disuade me from my meteorite theory.  Comments about all meteoriets being magnetic are untrue. Meteorites that are iron are almost all magnetic but others are out there as well. Check out

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What is the geology of the area where you found it? Is there a possible natural source nearby?  Is volcanism common in that area?

Aww well... send me a piece of it when you can. I'll scope it for you.  Small scraping will do.

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« Reply #23 on: November 15, 2010, 07:28:18 am »
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Stony meteorites are not magnetic, but all of those containing iron are. However, magnetism or lack thereof is not the only feature of meteorites.

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« Reply #24 on: November 15, 2010, 07:38:29 am »
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Dear Edjcox and all,

The area in which this lump was found has no inhabitants and no metal industries of any kind. However in the nearby seawater are the remnants of an old volcano or it may be a hydrothermal vent (I'm not a geologist). In the course of my research, I read that copper ores can be produced by hydrothermal vents, so I guess this lump came from those formations. The oxidation on the cleaned portions are greenish-blue, so my best guess is this is a piece of chalcopyrite (alt name is yellow copper ore). This week, weather and low tides permitting, I shall be exploring these areas further.

Thank you for the info on meteorites. I shall study it and try to commit as much as I can to memory. This info can come in very useful in the field. If I ever find any object that is like a meteorite, I'll post it in this forum for your opinion.

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« Reply #25 on: November 15, 2010, 08:46:16 pm »
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Update: I had the lump looked at by a chap who's rather savvy when it comes to local minerals and geology. It's plain old copper ore in massive form. Ah well....I may take a grinder to it and turn it into a nice smooth brassy yellow paperweight!

In no way do I consider this to be a loss; I've learned about the world of meteorites thanks to this lump, and will be on the lookout for space rocks in the future. My thanks to all who contributed to this thread! Smiley

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Offline Cyberborikua
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« Reply #26 on: November 15, 2010, 08:58:19 pm »
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Good job! Yes, learning is priceless and/or immensely valuable. Now go after the outer space rocks!  Detecting  Waveing

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« Reply #27 on: November 16, 2010, 04:49:49 am »
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  You have a great find, I would not clean it either. I may be wrong but I thought meteroites would have other metals not Bronze, but I am not an expert.  It may be a piece of space junk that melted as it fell back to earth ?   Just keep searching for an anwser to it's orgin. I would also check the area you found it in, for other pieces, maybe fragments also.
Your find is unique to say the least.  Great Job ! Clapp  Detecting

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« Reply #28 on: November 16, 2010, 10:25:40 am »
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That is an interesting conclusion... I would definitely seek more information though. Have it assayed or something.

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« Reply #29 on: November 18, 2010, 09:08:08 am »
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Seanengman, you are absolutely right. I did not stop there. Used up my meager stock of dilute HCl trying to clean it unsuccessfully. Sawed off a thin slice and blasted it with an oxy-acetylene torch till it melted and puddled. Meteorite fans, please don't be upset...this lump's not a space rock. The chopped off section exposed a consistent yellow.

To my surprise, there were little flecks of color mostly in depressions. I guess the yellow stuff is more dense than the surrounding metal(s) and sank as the metal cooled, hence the "craters". Rubbed the few yellow protrusions onto the back of a tile...I was expecting a brassy bronze streak, but got gold streaks instead. On the reverse of this small melted piece (approx 18mm x 20mm) is reddish copper. Time to visit a goldsmith for some HNO3!



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