GeoJack Posted October 16, 2013 Share Posted October 16, 2013 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. Quote Link to comment Share on other sites More sharing options...
weaver hillbille Posted October 16, 2013 Share Posted October 16, 2013 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 Quote Link to comment Share on other sites More sharing options...
GeoJack Posted October 16, 2013 Author Share Posted October 16, 2013 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. Quote Link to comment Share on other sites More sharing options...
The Found Dutchman Posted October 16, 2013 Share Posted October 16, 2013 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. imhoGJ, are you still using a Gold Bug 2? Or did you graduate to something else? All are really nice finds. The 2.5 pounder would the find of a lifetime for most people. Congrats Quote Link to comment Share on other sites More sharing options...
weaver hillbille Posted October 17, 2013 Share Posted October 17, 2013 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 ? Quote Link to comment Share on other sites More sharing options...
GeoJack Posted October 17, 2013 Author Share Posted October 17, 2013 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. Quote Link to comment Share on other sites More sharing options...
Hoser John Posted October 17, 2013 Share Posted October 17, 2013 To really find out how much gold is there try one a these and the truth will be known-John03-07-2013 % AU OF ROCKS.PDF Quote Link to comment Share on other sites More sharing options...
GeoJack Posted October 17, 2013 Author Share Posted October 17, 2013 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. Quote Link to comment Share on other sites More sharing options...
The Found Dutchman Posted October 17, 2013 Share Posted October 17, 2013 We don't have metal bones but they show up on Xray... what do you think is in them ?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 Quote Link to comment Share on other sites More sharing options...
weaver hillbille Posted October 17, 2013 Share Posted October 17, 2013 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? Quote Link to comment Share on other sites More sharing options...
El Dorado Posted October 19, 2013 Share Posted October 19, 2013 I have had a few of the species that I slabbed up X-rayed prior to cutting and it sure helped. Quote Link to comment Share on other sites More sharing options...
homefire Posted October 19, 2013 Share Posted October 19, 2013 If you have access to some old poloride Film I can tell you how to do your own x-ray. Black and White is Best. Quote Link to comment Share on other sites More sharing options...
GeoJack Posted October 21, 2013 Author Share Posted October 21, 2013 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? Quote Link to comment Share on other sites More sharing options...
El Dorado Posted October 21, 2013 Share Posted October 21, 2013 That depends on the market you have. You know I will always slab and cab for free.......might put a different market in your sights. Quote Link to comment Share on other sites More sharing options...
David Wiseman Posted October 22, 2013 Share Posted October 22, 2013 (edited) What was the technology that was used at the Sixteen to one hardrock mine in northern California to locate pockets? Edited October 22, 2013 by David Wiseman Quote Link to comment Share on other sites More sharing options...
Hoser John Posted October 22, 2013 Share Posted October 22, 2013 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 Quote Link to comment Share on other sites More sharing options...
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