Gemstones are an in-game currency that you can use to purchase items in the shop. You can earn Gemstones by leveling up as a Keeper, as a daily login reward, or you can purchase them in the shop. You can also purchase Gemstones in the Store.
Sundrops are an in-game currency that you can use to Hatch-a-Dot. You can earn Sundrops by completing Quests, foraging at Habitats, or receiving Sundrops as gifts from your friends. You can also purchase Sundrops using Gemstones in the Store.
In order to Hatch-a-Dot, you are going to need a Nest! Nests can be purchased in the store using real currency only.