Could this be gold dust?

[Nugglet]

The fine substance inside this rock. I don't think it's Gold doesn't look yellow enough to me but I'm very clueless so thought I would ask here

 

[Hurg]

Is that ironstone?

I'm going to go for copper pyrite... I'm a total noob so just guessing

 

[dwt]

could be hard to tell mate with such a dark host rock, i vote "dolly" time

is the rock ironstone ?

 

[Nugglet]

Have no idea what type of rock it is. Fridge magnet doesn't stick to it at all.

 

[LD.]

From my experience fridge magnet hardly stick to fridges and are so weak will unlikely stick to anything that is not perfectly flat, try a proper rare earth magnet maybe.

 

[Nugglet]

Borrowed son's earth magnets and indeed every surface of the rock is magnetic. Here are some more pics.

 

[Barra_Mad]

The rock looks like slate and the yellow specs are most likely Chalcopyrite with some oxidization on the surface. Its looks abit like the slate from around the Enfield area that has been referred in geological reports as "gold slate" and is described as " fine-grained, dark-bine, and greasy". So knowing where it came from and having more pictures will help.

 

[Nugget]

It looks very much like Magnetite (iron oxide).

 

[TenOunce Tone]

Don't look like gold to me.. I am no geo or expert..

Looks like its some kind of Basalt to me, does it make sparks if you hit the edge with a hammer?

Cheers, Tone

 

[Nugglet]

Thanks Barra just googled 'Chalcopyrite' and indeed looks like the stuff. This rock is from Gympie on the sunshine coast.

 

[Barra_Mad]

No Probs mate. have a read of this you may find something about the area you working in.

http://mines.industry.qld.gov.au/assets/geoscience-pdf/geological_framework.pdf

 

[Nugglet]

Cheers for the resource!

 

[GoldCheddar2005]

this is chalcopyrite from Dittmer. this is what produces gold here. found it a few weeks ago. cant wait for someone to cut for me. Good specimen.

 

[Barra_Mad]

Here is a nice piece of chalcopyrite I have. you can see why they call it fools gold.

 

[Nugglet]

Just showed that pic to my 11yo son (mad for gold) said he would be so excited if he found that