In the past, School of Dragons has been known to run holiday sales that included discounts on gem purchases. Gems can be purchased in six different amounts. What are the existing ways to gather Gems?
While today Gems are still scarce, it's not as rare as before. In the early days, the Gems were ridiculously rare, daily rewards would only reward 5 until two updates (one that changed to 15 and 25, and the current one), invite friends would reward Coins and even members would only start to be rewarded 500 monthly up until v1.03, July 25th, 2013. Unlike Coins, only registered players start off with 75. They are represented as purple gems ( ), which just like Coins, the amount of Gems in the icon changes.
Gems appeared ever since the game started, it serve as a premium currency, the opposite of the non-premium currency, Coins and Shards, and it's used to either speed up progresses, buy other currencies, age up your dragon, and allows the player to buy about more than 80% of the Store.