Board Thread:Questions and Answers/@comment-28529957-20180627064522/@comment-34703507-20180627074447

You'd have to be really unlucky.

I farm Gem in the level 24-8 (Super 17 chapter) and I get up to 29 gems in one run.

If Pilaf and Lunch don't appear, you still get 3 gems on the map and the boss drops up to 3 additional ones.