Which Frequency works best for silver?

[Dirtdog]

Hey fellow Deus owners,
I hunt civil war relics in western Mo, I normally use 12 frequency to hunt in, I noticed I find lots of brass with this setting, although I did get a 1/2 dime this week, I rarely find silver. My question is, does any frequency favor silver more then the other ones? Any thoughts?
Kenny

[del]

Hello Dirtdog , generally the lower the frequency the better for silver and copper and the higher the frequency is for lower conductors as lead and gold .

[Willems]

The deus loves silver in every frequentie.
But on 17khz gives a good high tone.
Specialy the small silvers.