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Metal Rock?

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ricsmith5 Topic starter

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	Metal Rock? « on: December 06, 2012, 06:00:27 pm »

Found this at a baseball field. It looked like it was covered in about 1/8" of asphalt and dirt. It is metal but not iron ( magnet has no affect). It weighs 4.6 oz., too heavy for aluminum and it is very hard, a file will not even scratch it. It's conductive, read zero ohms with my multimeter. Reads a solid 24 on my F75 VDI.
I don't think it's a meteorite ( I'm not that lucky) just wandering what kind of metal it is.

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	Re: Metal Rock? « Reply #1 on: December 06, 2012, 06:09:13 pm »

Can you scratch through the outer coating and see the color of the metal?

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	Re: Metal Rock? « Reply #2 on: December 06, 2012, 06:16:47 pm »

It can't be scratched by a knife or even a file. I did grind a small place with a bench grinder and it's dull silver metal color.

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	Re: Metal Rock? « Reply #3 on: December 06, 2012, 08:00:01 pm »

Next up is calculating the specific gravity on your item. That will probably narrow your metals to 1 to 3 choices.

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	Re: Metal Rock? « Reply #4 on: December 07, 2012, 08:34:43 am »

Looks like a campfire nugget to me. Aluminum can, melted by the heat of a roaring fire.

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	Re: Metal Rock? « Reply #5 on: December 07, 2012, 08:38:03 am »

I would agree except it's way too heavy and hard to be aluminum.

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	Re: Metal Rock? « Reply #6 on: December 07, 2012, 09:22:42 am »

What type of magnet did you use ?A fridge magnet isn't very strong I would try a rare earth magnet I have heard all meteorites are magnetic even Stone type meteorites have some amount of metal.

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	Re: Metal Rock? « Reply #7 on: December 07, 2012, 09:24:56 am »

	Quote:	Posted by ricsmith5
I would agree except it's way too heavy and hard to be aluminum.

You said the outside was hard. Did it spark when you touched it to the grinder? Aluminum won't spark. And a nugget is quite dense and heavy - not like thin aluminum, it feels more massive than a can despite being made from one.

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	Re: Metal Rock? « Reply #8 on: December 07, 2012, 09:28:04 am »

I checked it again, no spark.

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	Re: Metal Rock? « Reply #9 on: December 07, 2012, 10:04:31 am »

	Quote:	Posted by ricsmith5
I checked it again, no spark.

Most likely it is either aluminum or pewter in a melted nugget from a fire. Perhaps a house burned down on the site long ago.

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