trying to identify this for my uncle

Tasmanian Gemstone and mineral specimen Prospecting

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taurusjustin
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Joined: Thu Apr 30, 2015 7:24 pm

trying to identify this for my uncle

Post by taurusjustin » Mon Jun 01, 2015 9:00 pm

Hi all can any one identify this rock my uncle said he found it in a tin mine he used to work in down the east coast some where.
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mfdes
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Re: trying to identify this for my uncle

Post by mfdes » Mon Jun 01, 2015 9:51 pm

Cool looking mineral, but I really have no idea. It looks kind of wet and greasy...

taurusjustin
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Re: trying to identify this for my uncle

Post by taurusjustin » Mon Jun 01, 2015 11:42 pm

Yes it probably is a bit wet as he gave them all a quick wash under cold water to remove about 30years of dust off it so we could see it

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Philski
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Re: trying to identify this for my uncle

Post by Philski » Tue Jun 02, 2015 2:05 am

HI

its Smithsonite (ZnCO3) The green is Copper and also contains an appreciable amount of Zinc. Its the second largest ore of zinc after Sphalerite. Broken hill was built on it.


hope that helps

taurusjustin
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Re: trying to identify this for my uncle

Post by taurusjustin » Tue Jun 02, 2015 6:42 am

Thank you so much phill I had no idea I'll show my uncle Wednesday night he will be happy thanks again.

xtldigger
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Re: trying to identify this for my uncle

Post by xtldigger » Wed Jun 10, 2015 12:44 pm

It looks to be Quartz with some secondary Copper mineral giving it the green colouration, most likely Brochantite. definitely not Smithsonite. Any idea what part of the east cost it was found?

taurusjustin
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Re: trying to identify this for my uncle

Post by taurusjustin » Wed Jun 10, 2015 11:07 pm

Not sure but I will ask Thursday night when I see him. And I'll let u know where he found it.

xtldigger
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Re: trying to identify this for my uncle

Post by xtldigger » Thu Jun 11, 2015 4:08 pm

That will help a bit with the ID

taurusjustin
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Re: trying to identify this for my uncle

Post by taurusjustin » Wed Jun 17, 2015 8:21 pm

We think it came out of rossrden on the east coast if that helps.

xtldigger
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Re: trying to identify this for my uncle

Post by xtldigger » Sat Jun 20, 2015 5:58 pm

I would go with Brochantite on Quartz? there are primary Copper minerals in the Rossarden lodes, which would produce secondary species when oxidised.

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