found this looking for gold.

[hollowground1]

hey guys dug this up digging a target in the victorian goldfields, put it in my trash bag thinking it was part of stubby, got home and had another look , there is most likely more of it in the hole as it looks like i chipped this bit off a larger chunk while digging. may be Obsidienne but has shiny specks all through it, if i hold it up to the sun the light doesn't penetrate it. i don't have much idea when it comes to rocks, i will have to remedy that.

thanks fellas .

 

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[Turkısh Man]

Rainbow obsidian :

 

[hollowground1]

thanks turkish man, allot better then a broken beer bottle

 

[Eu_citzen]

Looks like its got fractures which break up the light into its spectral colours, what ever it is. A rough, freshly exposed surface would tell more.

 

[Turkısh Man]

Rainbow obsidian on the net :

 

[Eu_citzen]

Zoom in on the picture Hollow shared. You can easily see it is very different from rainbow obsidian.

 

[Brian T. Booth]

hey guys dug this up digging a target in the victorian goldfields, put it in my trash bag thinking it was part of stubby, got home and had another look , there is most likely more of it in the hole as it looks like i chipped this bit off a larger chunk while digging. may be Obsidienne but has shiny specks all through it, if i hold it up to the sun the light doesn't penetrate it. i don't have much idea when it comes to rocks, i will have to remedy that. thanks fellas . <img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=912686"/>

I'm with EU. I don't think its rainbow obsidian. More pics would be great. Thanks buddy

 

[simbad42]

Looks like black opal

 

[JLeonhardy]

Welcome HollowGround! I've fossicked a fair amount in Victoria -- mostly in the hills out of Bairnesdale, Reedy Creek and other areas around Beechworth. Have read far mos than I've dug, though. I have never heard of *any* obsidian being dug in Oz. I have to agree with Simbad -- looks like black opal to me, which would be *very* unusual for the goldfields area, but far more likely than obsidian! It's a magnificent specimen!

 

[Aussie]

Looks like black opal to me, but man you're a long way from coober pedy. That's a nice size, congrats mate!

 

[huntsman53]

Considering the location where you found it and due to the fire showing in the rock, I believe it is a form of Black Opal.


Frank