i would recommend the use of water tao's lvl 54 in forest mine, cause they got dh = fast getting to the mine.
Dont' yeah DON'T put all the waters at one place, cause you will get less ores(sounds wierd but its true) i mined with 2 accounts and got only a few ores -_-
if you have lvl 70 waters(from water factory.. or something) go to desert mine ive got many moon gems there plus high rate gold ores