Jump to content
Nugget Shooter Forums

Using X-ray to view lode gold


GeoJack

Recommended Posts

Have some rocks that have some good gold in them and wanted to see how much and what it was like before I committed them to the acid process. Took them to my local vet for an x-ray. Bottom left piece has quite a bit of gold showing on the surface so used that as a measurement in the x-ray. Well spent $45.00. Top right piece weights in at 2.5 lbs.

Xray%20rocks%20sm.jpgXray%20sm.jpg

Link to comment
Share on other sites

Wouldn't other elements in the sample also show as opaque, for instance, Ca , P and/or Fe?

?

then again, I guess you are on to something

,,,http://www.sciencedaily.com/releases/2013/08/130821094931.htm

Link to comment
Share on other sites

Weaver,

I'm sure it would, maybe that is why it took three takes to get this shot. Don't know about the P, but we have the Ca and Fe for sure. Calcite is the main carrier in this system and is always on the quartz where the AU shows up.

Link to comment
Share on other sites

I don't think the Ca,P,Fe,Si,K,etc would show up like the native gold would since it's not in metallic state. imho

We don't have metal bones but they show up on Xray... what do you think is in them :brows: ?

Link to comment
Share on other sites

FD, still swinging the GB 2, upgraded from my just my pick for the ones in the pictures. Progressed from the tailing pile to contact with the vein and these came out of a vug. Hand chiseled them out with a five pound drilling hammer and chisel.

Link to comment
Share on other sites

John, I've had difficulty using that method as the quartz is full of pockets. I actually get a negative weight when looking right at the gold in the rock.

The X-ray was used to id the gold location so I can trim the specimen down with a wet saw prior to the acid treatment so I don't use acid on rock unnecessarily.

Link to comment
Share on other sites

We don't have metal bones but they show up on Xray... what do you think is in them :brows: ?

I said they wouldn't "show up like native gold since it's not in a metallic state". The key words are "native gold". Ever see tooth xrays?

The silver amalgam shows up better because it's in metallic state, unlike the Ca,P, etc which are in compounds.

GJ- really,really nice finds. Wish I was your neighbor. lol

Link to comment
Share on other sites

Ok, you're not just looking for any opacity - but the degree of/differences in.

I take it you had to reduce the exposure time in order for it to not looked washed out/ so that there was some contrast?

Link to comment
Share on other sites

I have had a few of the species that I slabbed up X-rayed prior to cutting and it sure helped.

El D, I was told by a gentleman at the Gem Show in Placerville that gold in this rock is good for slabbing and cabs whereas the rocks we showed you at Rye Patch are not. Is he right? Should I slab these and have cabs made? It is more lucrative than trying to use acid and sell the specimen?

Link to comment
Share on other sites

Color enhanced side scan sonar and still have a video from that particuliar tv show,discovery I believe, and saved the mine for sure!! Nice seeing them huge pockets gleaming yellow on a monitor many feet into them tunnel walls-John

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...