can someone help me identify this rock please?

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tinamfarrell

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can someone help me identify this rock please?

i found this in my yard it is about the size of half a piece of bread in width and length and is hard , it is dark , almost black inside with orange crystals

John

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hello Tina M Farrell, Do

hello Tina M Farrell,

Do you live in or near Franklin, New Jersey, or Cananea  or Sonora, Mexico?  If so I think these yellowish crystals might be a light-coloured variety sphalerite called CLEIOPHANE, with normal blackish brown sphalerite in the background.

However it is an unusual mineral, so we could do with a better photograph, and a test. 

Can you test the hardness for me please. Do you know how to?  If not come back and I shall explain.

John

“Civilisation exists by geological consent, subject to change without notice.” -  Will Durant


John

“Civilisation exists by geological consent, subject to change without notice.” -  Will Durant

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