This last weekend I got a few good rings and the best was a nice 16.2 gram 18K gold band (one big ring) and its VDI was right there around the zinc penny or a bottle cap VDI's of 50's. Also the predominant frequency was 7.5 the red color if you're running stock colors. Dig the pennies and bottle caps that polar plots (if you have the V3i) and shows three nice lines.
You found all those rings in one weekend?
Thank you for proving my point. I keep telling all the guys "dig those zinc cause it could be a big gold ring!!!!!"