Heroes can be recovered, or their healing rate can be increased by gems.Players can also speed up the production of resource collectors such as Gold Mines, Elixir Collectors, and Dark Elixir Drills for a period of time using Gems.Gems can also be used to instantly complete the construction or upgrade of Buildings, upgrades in the Laboratory and Star Laboratory, and the rebuilding of the Ruined Buildings in the Builder Base.They can also be used to perform 'Quick Donations', which donates troops to others without needing to train them. Gems can be used to request for Clan Castle troops before the cooldown to do so expires.Gems can also be used to boost or finish training Troops in the Barracks and Dark Barracks, boost or finish Spell brewing in the Spell Factory and Dark Spell Factory, and boost or finish Siege Machine production in the Workshop.Gems can be used to buy other resources such as Gold, Elixir, or Dark Elixir in varying amounts.There are several items, such as the Pirate Flag, Ancient Barbarian Statue, the Mighty Statue, and Builder's Huts, that can only be purchased with a substantial amount of Gems.Additional Gems can be earned in-game by completing Achievements or clearing Obstacles or purchased with real money. When players first download the game, they begin with 500 Gems (250 of which you are forced to use during the tutorial, and another 8 if you rush the buildings and troops when prompted). Gems are the premium in-game currency used to advance players' villages.

Clash of clans unlimited gems