Talk:Monster Musume: Everyday Life with Monster Girls Online/@comment-25601391-20160519183140/@comment-25390763-20160519185608

http://wikiwiki.jp/mon-musu/?%A5%EF%A5%F3%A5%B9

Basically you get 10 gems after 700 of each of care events, shopping trips, synthesis (leveling), outings, and meals, 20 gems after 1000 of each of those, and 1 gem after clearing each main map for the first time, with 31 total, which means you get 181 gems total from one-time quests.

You get 1 gem from completing the daily outing 5 times on Saturdays and Sundays JST, and all other gems are from event completion and login rewards.