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#1 2015-03-05 23:23:26

VANGBAC
Silver Stacker
From: Hobart. (Tasmania)
Registered: 2010-07-23
Posts: 1,397

Any info.

Can any of you detecting guys/ gals give a rundown on contents of this lump? thank you.


449_screenshot.png

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#2 2015-03-05 23:29:15

cashgoldsilver
Banned
From: Melbourne - Victoria
Registered: 2014-11-10
Posts: 217
Trades :   11 

Re: Any info.

Gold IMHO with plenty of quartz which is very common,because the 2 are often found together.

I am very sure that there is a good formula to work out the weight of the gold but I do not know it  roll

Very very nice  tongue

Good door stopper - where do you live  big_smile

Good find/buy.

CGS  smile

P.S. I could be wrong,but I will never admit it  lol

Last edited by cashgoldsilver (2015-03-05 23:30:52)


Quote - Cash is King - Gold is Insurance - Silver is Speculation - from heyimderrick - from the windy city - Chicago.

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#3 2015-03-05 23:33:06

mmm....shiney!
Silver Stacker
From: 昆士蘭
Registered: 2010-11-15
Posts: 15,930
Trades :   102 
Website

Re: Any info.

We need a "tagging" capability on SS.

Clawhammer.

Quartz definitely, no gold, pyrite? blue stuff (Some copper compound??)

Where did it come from?


The woolgrower's target shall be the good thriving of his flock and its pastures, and so of himself and those whose livelihoods depend on his enterprise.
"The Woolgrower's Companion", 1906.

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#4 2015-03-06 03:36:41

Clawhammer
Silver Stacker
From: Gone Fishin'
Registered: 2010-02-26
Posts: 9,505
Trades :   

Re: Any info.

Ok this'll be a stretch.
Quartz with chalcopyrite.
It'll be Chalcopyrite which can have those brassy pink, gold, blue & green metallic species... it can be just a function of how the cyrstals grew.
HOwever that patch of dull dark blue/ green mineral has attracted my attention. Have you got a clearer pic ?


Specialisation is for insects

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#5 2015-03-06 05:02:20

Clawhammer
Silver Stacker
From: Gone Fishin'
Registered: 2010-02-26
Posts: 9,505
Trades :   

Re: Any info.

Here's a stock pic of some chalcopyrite... I think the black matte coloured stuff (in VANBAC's pic) is an iron oxide, although Chacopyrite can also take this form.
I'll guess that it might be later stage authogenic Goethite, whichcan take on a metallic tinge... however this would have to be confirmed with the presence of come radiating crystals.
Chalcopyrite
179_chalcopyrite.jpg
Goethite note radiating crystal structure in this 'specimen quality' sample
179_goethite_cornwall.jpg
Also Goethite
179_goethite_crystals-spl.jpg

Last edited by Clawhammer (2015-03-06 05:24:51)


Specialisation is for insects

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#6 2015-03-06 20:07:44

VANGBAC
Silver Stacker
From: Hobart. (Tasmania)
Registered: 2010-07-23
Posts: 1,397

Re: Any info.

Thanks all this came from another Forum. Have asked  PMd him to go to this page and read the answers. Hopefully if he does clawhammer will get a close up if not I will ask him for one.

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#7 2015-03-06 21:24:16

Clawhammer
Silver Stacker
From: Gone Fishin'
Registered: 2010-02-26
Posts: 9,505
Trades :   

Re: Any info.

The 'black' stuff may be Tenorite... but that mineral is more typical of deep copper sulphide deposits that have been weathered.  The 'fresh' nature of the chalcopyrite, together with the absence of Cyrosocolla, Azurite and Malachite which are typically associated with Tenorite support my original guess.


Specialisation is for insects

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#8 2015-03-06 22:25:31

VANGBAC
Silver Stacker
From: Hobart. (Tasmania)
Registered: 2010-07-23
Posts: 1,397

Re: Any info.

Have asked him to come over and look he says thanks and will so maybe be able to find out location and more. interesting looking piece. If he needs a close up and cannot do I will get and upload for a closer look.

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#9 2015-03-07 06:45:06

mrjamie
New Member
From: Denman
Registered: 2015-03-07
Posts: 7
Trades :   

Re: Any info.

here is a close up of the rock !

6drh8u
Source:

http://prntscr.com/6drh8u

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#10 2015-03-07 06:49:27

mrjamie
New Member
From: Denman
Registered: 2015-03-07
Posts: 7
Trades :   

Re: Any info.

and another http://prntscr.com/6drhl6

i dont know how to add the pic in this post hmm

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#11 2015-03-07 09:37:58

VANGBAC
Silver Stacker
From: Hobart. (Tasmania)
Registered: 2010-07-23
Posts: 1,397

Re: Any info.

449_photo2.jpg
449_photo3.jpg
449_photo_5.jpg

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#12 2015-03-07 09:38:50

VANGBAC
Silver Stacker
From: Hobart. (Tasmania)
Registered: 2010-07-23
Posts: 1,397

Re: Any info.

Heres a few CH if you could give any more info thanks mate.

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#13 2015-03-07 17:14:38

Clawhammer
Silver Stacker
From: Gone Fishin'
Registered: 2010-02-26
Posts: 9,505
Trades :   

Re: Any info.

Its all chalcopyrite (apart from the quartz).

The dull black/blue is probably a result of the chalcopyrite being 'squeezed' & deformed as evidenced by those pieces of grey coloured 'country rock' that are striated and polished.


Specialisation is for insects

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#14 2015-06-30 22:24:31

argyle
Member
Registered: 2015-06-30
Posts: 16
Trades :   

Re: Any info.

Whenever you get what I like to call the "petroleum spill" look on a specimen rock host, and it carries any form of sliverish, copperish or gold hue..... It is Always a Pyrite pyritemix.

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