Thank you all very much for the input. I see now that I made an error. I had meant to say a one pound nugget.😞 Again I do apologize. I'm searching for a cache that contains 2 one-pound nuggets and some gold coins. It may be only a few inches deep. However,I hear that folks sometimes used to bury things at or below Cornerstone. I have dug up 2 Cornerstone which were about 18" deep and one that is about 36". I have narrowed my search area down to roughly 800 square feet. I originally was looking to purchase a Whites TM808,but was told it would take me months to figure out how to use it,so this Minelab 800 was their suggestion.