If your guild is of a high enough level, you and all your guildmates will receive bonus points to the rating of the gems you obtain. The higher the level of your guild, the better the bonuses. There are four types of bonuses:

 
  • Totem Gem Bonus - bonus rating points to the gem merged in the totem.
  • Stolen Gem Bonus - bonus rating points to the gem stolen from another player.
  • Retrieved Gem Bonus - bonus rating points to a stolen gem retrieved by you or your guildmate.
  • Mined Gem Bonus - bonus rating points to the gem obtained from a mine.

Not all bonuses are available from the start, you will need to level up your guild to level 16 to unlock them all.

Your friends will also add a Retrieved Gem Bonus to each gem they retrieve for you but according to their own guild level.
 
You will also receive a certain rating bonus to the gem merged in several first totems at the very beginning of the game. This is done to motivate the newcomers.