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What is the vdi- on gold coins?

... found by metal detectorists are nickel-sized "Half Eagles" ($5.00 gold pieces) and these register from 50 to 55 on the VDI scale. Yep, smack dab in the middle of the screw cap renge. At sites which saw use prior to 1933 (when gold coins were withdrawn from circulation) be sure to ALWAYS dig those target which VDI in taht range. Hope this helps; HH Jim
 
target position, nearby masking, and ground mineralization, to name just three influences.
As a rule, typical US Gold Coin readings will be:
$1.00 ... Similar to foil. Small foil.
$2.50 ... About in the US 5
 
<BIG><STRONG><FONT COLOR="#ff0000">SOME VARIOUS COIN VDI
 
Thanks for making this informative post. Per this discussion on gold coin VDI's, you will note that the 1/4 ounce coin, identical to a US $5.00 gold piece, registers at 52. This is consistent with my previous comments that such coins register 50 to 55 on the scale. I have noted as much as a 2 point variance in VDI numbers between identical models of detectors, (and the same denomination of gold coins) thus the "spread' of numbers. The 1/2 ounce coin, identical to a US $10.00 gold coin, registered at 72; I suggest a truer "spread" of 70 to 75. The diminutive $1.00 gold pieces I have tested register at 15 or 16. They were likely the most frequent gold coin LOST, but the $5.00 gold piece is the most common one FOUND. (That is to say, if finding gold coins can be referred to as "common," which it ain't. <img src="/metal/html/cry.gif" border=0 width=40 height=15 alt=":cry"> ) HH Jim
 
MANY THANKS, Art! I've been waiting for someone to post this type of information. LOL/HH.
 
For us too busy(lazy??) to do our own test, much less have the gold coins and other rare types to use for the test, this info should come in very useful for a ballpark figure for figuring where these coins fall on the meter. many thanks!!! Bob.
 
There have been many mentions of how much better detecting is in the spring or after a good rain.
Now that you have established an excellent base set of conditions I wonder if there would be any change if you used wet phone books?
Don't use your current books. They take a super long time to dry. <img src="/metal/html/glasses.gif" border=0 width=15 height=15 alt=":geek:">
 
... they'd probably have rotted away! <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
 
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