Metallic blue rock

[gemsnmore38]

I need help. This rock has a metallic blue luster to the outside of it (no it's not paint lol) and the only thing I came up with so far is stromeyerite. I have done every test I can on it and it all points to that. If it truly is, then it's worth a pretty penny due to its size. Any ideas?

 

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[wheelerite]

looks like petrified wood. Is the rock attracted to a magnet?
ksmith

 

[gemsnmore38]

Definitely not petrified wood. Breaks like shale and non magnetic

 

[austin]

I think its slag of some sort...

 

[Eu_citzen]

So, what tests did you do? And what where the results? Details, please!

Since it seems to have cleavage, we might be safe to assume it's not stromeyerite.

 

[gemsnmore38]

Streak test which was steel grey, hardness test which it can be scratched with a fingernail. The metallic blue coloring is on the outside which I assume is from oxidation because I broke a small piece off and it is flat dark grey underneath. Unfortunately I don't have the stuff to do a gravity test. Any other test I can do from home?

 

[gemsnmore38]

Closer up in the sunlight

 

[Oddjob]

Looks like Oil Shale.

 

[gemsnmore38]

The bottom of it is completely flat and looks like a layer of Quartz

 

[Brian T. Booth]

It's phyllite/ Chloritic phyllite. Might have some chlorite within the rock giving it that blue cast.