Posted by Vulcan Blaze

If you mine emeralds, for 1 hour, the most you can approx earn is about 6960, and that is with a diamond pick, which costs 400 each, every 1200 hits. With calculation, 1 Diamond pick can last for approx 44-45 emeralds.
The most I calculated you could mine in an hour approx is 240. Which means you will need 5-6 Picks every hour. This is 2000-2400.
So essentially approx the most you can earn mining emeralds now is 4560-4960 Gralats per hour, and thats if you mine non-stop, including time for when you move to mine another rock.
(An Approximation).

And using those calculations, the max xp you can earn for emerald in an hour, with a Diamond pick is 24000.