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I was in a local soccer field today and I had a good steady 68-69 vdi with 7.5 being the dominant frequency. This usually says twist off or occasionally a penny. I dug it and it was a 925 chain with a 925 peace sign. Why did it not ring up like silver? After I dug it I even scanned the hole to be sure. I hope this doesn't mean I have missed a lot of good targets passed up as garbage.
i found a 925 ring with a vdi of 35.. it was a small childs ring. a lot depends on the size, depth, soil conditions and if there was anything masking it. someone else on hear might be able to help too..good luck
Those vdi numbers are not strange for silver. We forget that often when we think of silver our reference point is a coin. A round piece of higher conductivity than most targets with more mass = higher visual indicator. The chain is not seen en mass by the detector but rather the clasp and links are sensed like individual targets. Rings can be all thicknesses / thinness. Try passing a silver 3 piece or half dime by your coil and check the reading. Half real coins, 6 1/4 cents in silver when they circulated, ring up 50's and a bit higher sometimes. The old adage of dig it all or everything above iron has much merit but realistically it's hard to do in a setting where you have to be careful and neat.
HH-Bruce
