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It is extremely heavy. The crust on it is brittle but it itself is extremely hard, actually it scratched my porcelain. Gold tested it acid didn't disappear.  No polishing done I just cut it with a Dimond cutting saw.. it took it to a rock museum and 2 rock shops and a geologists.. Noone has any idea.  O and it is not magnetic .. 

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That hard, perhaps some kind of Tungsten Ore.  The only Tungsten I have come across was grey, but was a almost powder in the middle of a crack in Bull Quartz. 

No reason I know of that it could not get cemented together and form a super hard rock, but what do I know.

  • The title was changed to Can Anyone Identify This?

Do a specific gravity test. Tungsten is about 19.3...same as gold. I would think a tungsten lode, if you can find it, would have some value. Scheelite is typically the ore Tungsten comes from. Scheelite glows bright blue under short wave UV light.

Jim

I just did some research and found out tungsten is rarely found as a metal....it's almost always found as a mineral, and requires refining to get a metal form.

Jim

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