>>32576905Well, Gems get consumed while Z-Crystals don't, so they're not really the same. They lend themselves to different strategies. Giving a Pokemon a Gem lets you benefit from stuff like Unburden or Acrobatics once the Gem is used, and even let you use moves like Thief and Covet or abilities like Magician and Pickpocket to get a new item later. Meanwhile, Z-Crystals don't let you use those kinds of strategies.