You can get more Gems through the following ways:
You earn a significant amount of gems and gifts when referring friends to play Storm of Wars. Go to 'Menu' > 'Referral', scroll down and click the button 'How it works'. This topic tells you all you need to know about Referrals.
Go to 'Menu' > 'Quests', you will see all the quests for the day. Each quest is challenging but also gives a good amount of Gems as rewards.
You can get free gems from the Guild Gifts. Finish a *Special* Quest with Guild Gift, a free gift will be sent to all your Guild members. Join a Guild today!
You can also purchase Gems from the Gem Shop 'Shop' > 'Gems'.
Unfortunately we can’t offer you free gems as that would not be fair to other players.