Mobs Drop Emeralds

Somewhat self explanatory, the title says almost all of it. Mobs, when killed, have a chance of dropping Emeralds in their loot. The chance of Emeralds dropping depends on the type of mob killed.

Looting affects Emerald drop amounts, but not drop rates. All Looting levels at or below your current level roll until more than one Emerald is selected. For example, with Looting 3, it would roll 3, 2, 1, then fall back to one emerald. If you got the roll on level 2, you would get the result of level 2.

No Looting

One emerald will drop.

1000 emeralds in 1000 drops.

Looting I

20% of the time, 2 emeralds will drop.

1000 emeralds in 829 drops on average. (17.10% faster than no Looting)

Looting II

10% of the time, 3 emeralds will drop.

1000 emeralds in 721 drops on average. (28% faster than no Looting)

Looting III

5% of the time, 4 emeralds will drop.

1000 emeralds in 652 drops on average. (35% faster than no Looting)

The information above was calculated here. Feel free to check my work :)