HORRIBLE! Had to turn off space dust, backgrounds, everything to minimum to find rocks, and there were hardly anytime more than 2 on 1 screen. Compared to other fields... that's ridiculous.
3:31 for 3850
3:35 for 4020
5:00 for 4179
4:04 for 4020
I have to agree. It's really difficult to localise the rocks with your eyes. It's kinda the same in Nagano's Platinum ore field.