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I was discussing detectors with an authority in this area and he was saying a gold nugget sounds almost exactly like a .22 lead bullet. I was puzzled at this because I thought most native gold has over 10 times better conductivity than lead. I guess it really depends what's alloying with the gold, but I found some information on this
http://geology.about...ages/blgold.htm
http://en.wikipedia.org/wiki/Gold
One quote, "Native gold is usually alloyed with some copper as well as other noble metals like silver, platinum, and palladium."
Another, "Native gold contains usually eight to ten per cent silver, but often much more"
I also found that silver and copper are close to 20 times more conductive than lead. So, how can a nugget sound almost exactly like a .22 lead bullet?
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Native Gold conductivity
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#4
bigdigger 
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Posted 22 December 2005 - 09:41 PM
QUOTE (Montana @ Dec 22 2005, 05:18 PM)
Most bullets and buckshot are also alloyed to control deformation. Bismuth and tin can be used to harden lead. Some .22 slugs have a thin copper coating also.---Bob
Good point!
#5 Guest_Mike_*
Posted 29 December 2005 - 05:51 AM
QUOTE (bigdigger @ Dec 22 2005, 10:06 AM)
I was discussing detectors with an authority in this area and he was saying a gold nugget sounds almost exactly like a .22 lead bullet. I was puzzled at this because I thought most native gold has over 10 times better conductivity than lead. I guess it really depends what's alloying with the gold, but I found some information on this
http://geology.about...ages/blgold.htm
http://en.wikipedia.org/wiki/Gold
One quote, "Native gold is usually alloyed with some copper as well as other noble metals like silver, platinum, and palladium."
Another, "Native gold contains usually eight to ten per cent silver, but often much more"
I also found that silver and copper are close to 20 times more conductive than lead. So, how can a nugget sound almost exactly like a .22 lead bullet?
http://geology.about...ages/blgold.htm
http://en.wikipedia.org/wiki/Gold
One quote, "Native gold is usually alloyed with some copper as well as other noble metals like silver, platinum, and palladium."
Another, "Native gold contains usually eight to ten per cent silver, but often much more"
I also found that silver and copper are close to 20 times more conductive than lead. So, how can a nugget sound almost exactly like a .22 lead bullet?
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Hi bigdigger, Native Gold has a poor conductivity. It is only about the same as iron. That is why you cannot discriminate it! Gold is only a very good conductor after it has been smelted. This is also why Metal Detector manufactures have been unable to make a good discriminator for it!Good hunting, (Aussie) Mike.java script:emoticon('<_<')smilie
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