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Old 06-21-2017, 09:27 AM
Rodger d Rodger d is offline
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Default What is this

I found this in northern ND. It's a smooth black rock that has 3 layers, first layer is smooth black and brittle, second layer is a very soft, almost powder rust red substance, inner layer seems to be metallic. Magnet test was negative.
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Old 06-21-2017, 12:58 PM
JOE319 JOE319 is offline
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Could be any one of a variety of iron ore...Only one variety is magnetic...Magnetite
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Old 06-23-2017, 10:44 PM
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Tom_in_CA Tom_in_CA is offline
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looks like a question for a lapidary forum.

Welcome to FMDF
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Old 06-23-2017, 11:16 PM
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metaladdict metaladdict is offline
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Location: Northern , Cantaffordya.
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I can't see it.

Detectors. Garrett AT Pro, Ace 250. Minelab Sov Elite. Equinox 800.
They can have my metal detector when they pry it from my cold dead hands!! John 14:6.
Oldest U.S. coin 1899 Half dollar (see upper left)

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