Love this topic! I have a single small rock to get back too! It was 40degrees C plus, late in the day and i was checking side creeks (pic 1) to find the source of gold in the main. Good signal with the ZED in HY/normal and HY/diff and with my pin pointer!!!! My pick is trying to pry the rock out in pic 2. Hoping it would be nugget in a crack i was dismayed to pull out this one rock that looked the same as all the others (in front of my knee pic 3)...and i ditched it! Is the rock type arenite? Super hard...Anyhoo, for whatever brain fart at the time i left it behind! Bloodgold 2 have you guys found gold in this type of rock? ps sorry about the pic quality, i took snap shots from go pro footage on my mac.