[Demonskid]

Buy them from the site (they don't use 'donate' they use BUY)

Buy from other users

Guilded Chests (gold chests) are sure to give gems

exalting gets you a RARE chance at a gem

get 1 free gem daily for keeping your dergs fed over 80%

sell items like food stacks, apparel, familiars.. stuff for gems