Odd reading on large ring?

[nagov]

I had been digging can lids for three hours (they read 12-37-40's), working in waist to chest deep water and just tone hunting (can't see screen), I hadn't found a coin all morning when I came across an odd signal, almost can lid high but a lower quality to the tone too... so 1st scoop and at first the tone was gone but there was nothing in my scoop (must have been a floater).... rescan the hole and now I have a foil sound and weak. 2nd scoop its still there but louder now....3rd scoop and now it is starting to sound like a large target, 4th scoop and nothing in the hole.... and there is this almost stainless looking ring in my scoop. I believe this was a case of two targets under the coil and the CTX let me know it. I air tested the ring and it read a 12-01, a low reading like foil or small gold but this isn't small. It has marks on the inside the ring along with a date and June spelled as JUNI (German) It is stamped 585..... haven't seen that in awhile and I had to use the phone and look it up..... 14k. Tested 14k at home and weighs in at 15.5 grams, size 13-3/4 and falls right off my thumb.

What I find odd is that a ring of that size and mass reads out as a 12-01..... it is white gold, could that be what is giving the reading of 12-01.

Cross in the photo is 925.

Settings: Manual 25, seawater enabled, Ferrous-Coin, Combined 5 tones, Tone - Long

Cliff

 

[GKMan]

I have a 14k white gold ring, that looks to be just about the same as that. I will scan it later and let you know what I get

 

[nagov]

I have a 14k white gold ring, that looks to be just about the same as that. I will scan it later and let you know what I get

Appreciate that GK

But

Now it reads as I would have expected.... 12-34, solid no jumping yet out in the gulf with half the coil in the water, it read 12-01..... I'm totally confused but still happy I got the darn thing!

Cliff

 

[Larry (IL)]

There is such a thing as 585 platinum which would be 14K...........

 

[ML]

Great find. Possibly another target under the coil as well? Did you happen to scan back over the hole after retrieving the ring?

 

[nagov]

Great find. Possibly another target under the coil as well? Did you happen to scan back over the hole after retrieving the ring?

12-01 reading was an airtest at the surface after retrieval. detector in a position like in the original ad..... floating front of coil out of the water and the bottom half in the water....12-01 two different times...... 12-34 with same settings airtest at home.

Strange

Cliff

 

[Johnnyanglo]

Low conducting rings (14k gold alloys) tend toward 12-01 (foil), especially if they aren't presented parallel to the coil. Try turning the ring to differing angles and see how the Fe-Co values change.

Johnnyanglo

 

[nagov]

Low conducting rings (14k gold alloys) tend toward 12-01 (foil), especially if they aren't presented parallel to the coil. Try turning the ring to differing angles and see how the Fe-Co values change.

Johnnyanglo

Thanks for the tip..... I'll check and see later today. It is quite possible while holding the scoop and detector in one hand and waving the ring in the other that I may have had the ring in an odd angle to the coil....I know that wasn't the case at home with the air test!

Thanks for the reply and information, I appreciate it....

Cliff

 

[scutney]

my wedding ring is 14k white gold band and it rings up like 12-16 to 12-20

 

[Johnnyanglo]

It's all about getting eddies to circulate on the ring surface.

Uneven/ornate ring surface - lower Co value. Poor conducting alloys in the ring surface - lower Co value. Thin surface - lower Co values. Broken/cracked ring surface - lower Co value. Ring presenting an oblique angle to primary coil field - lower Co values.

Of course, the detector coil has to get directly over the target for a couple of sweeps to allow the detector to determine ferrous/non-ferrous quality. Being off-center with the coil sweep can give erratic/incorrect Fe-Co values (as can giving it too wide a sweep that averages in nearby targets/iron/oxides).

There are enough things that alter the Fe-Co values for a ring in the ground/salt water vs. one under air testing conditions.

Johnnyanglo