Last Copper Question

Just a simple one. Muchly appreciated for any cooperation on helping me!

Basically,

Why are certain coppers different colours to others.

For example I have 2 balls of copper below. One on left is darker than the shiny one on the right? Does the right one have some kind of casing because if I scrape it, it becomes shiny like the left one :D

http://i1085.photobucket.com/albums/...y/100_0753.jpg

Explanation please?

The wire might be burned. Where did it come from.

If it is from a motor or transformer, it might be coated with varnish (electrical insulation). Or it may just be slightly oxidized.

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Originally Posted by poundigity24

The wire might be burned. Where did it come from.

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I don't think it is burned and I found it down the woods in a motor.

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Originally Posted by fnord

If it is from a motor or transformer, it might be coated with varnish (electrical insulation). Or it may just be slightly oxidized.

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Okay thanks, it may indeed be varnish. Sounds more promising than the oxidization. Do you know if the copper is coated in varnish it will sell for less?

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Do you know if the copper is coated in varnish it will sell for less?

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Read your "other"post.