easy way to get gems from mz mine, lets say u want to get a few gems (hopefully)...
first off, if you wanna mine over night and not get a full inventory, then u gotta start mining at around 9PM (just to be safe) and empty your inventory WITHOUT MOVING!!! (drop 9 ores at a time, when they dissapear drop another 9 and so on...) so by the time its midnight (12AM) you'll only be pulling 1 ore every 20-30 minutes meaning that instead of pulling in all ores you'll pull in the odd one here and there and have a higher chance of getting a gem when you wake up..
im not saying you will get a gem, but your odds are much higher....unless you get pkd........if you dont, ive gotten up to 4 gems over one night, (2x ref rainbows, 1 drag, one ref kylin)
just remember DONT MOVE WHILE MINING!!!!!