Fisher Gemini 3 2 box

[Tnwoods]

I can't seem to find an answer anywhere about this. So I am going to ask folks with more experience.

This detector is great - and in ideal conditions can locate metal at a 20 foot depth.

However, what I am looking for at the moment is likely under around 6' of granite.

One day I will get a positive signal - the next day same spot none - the next time I get a signal again. The weather I am sure plays a factor in this.

But my question is about granite. Would that greatly inhibit the signal?

Any answers would be appreciated! Thank you

 

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[cudamark]

I can't respond exactly to your situation, but, EMI, mineralized pockets, and operator error can cause false signals in a 2 box. Keep in mind that most 2 box machines won't hit reliably on anything smaller than a soda can. Just to satisfy my curiousity, what make you think anything is worthwhile under 6 feet of granite, and how the heck would you get to it? Dynamite?

 

[Tnwoods]

I have my suspicions.......................I think it is a granite shelf that has a cavity that has been buried with fill. Would a solid rock barrier impede the signal? I guess I will have to run some experiments using boulders...........