Episode 20: when Garnet is describing how bad Minami's boyfriend is that Sapphie assist on registering the new terms through signs.
Garnet uses her magic and to change Minami's clothing into a sexy bikini to impress Miyamotto. Hilarity ensues.
Episode 23, at the beginning of the episode Ruby accidentally wets the bed where she and her Jeweller are sleeping. It gets better when Ruby tells everyone to class that Rinko did it to save face (Rinko's 14. You may start cringing.).
The whole New Year's episode. Gaze to be amazed.
The ending of episode 10 when the students manage to use magic (When all magic is disabled) out of shear rage
In one episode, Moldavite buys these two small girls which function as his conscience and help him weigh his options. After many mishaps, the two girls demand to know which one is cutest and this debate ends up involving the entire population of Jewel Land, coming into a tie. So, they demand Moldavite's answer to untie the debate. His answer? JOLLY AND MERRY!!!
Sulfur's mother squashing him with a fly-swatter... So random and came out of nowhere.
In the same episode, Moldavite tries to transform Leon into Sulfur, but Dian shouts "RANGULA!" and a giant statue falls on him. Twice.
Marianne's wedding dress in episode 16. It's almost a Christmas tree, seriously.
In the New Year's episode, Peridot goes hopelessly bonkers after thinking too much about the punishment she's getting if she fails in keeping Rald out of trouble.
In episode 49, Kanon, Kaede and Komachi are forced to dance in flashy clothes to 80's music.