Gem

SkyBlock Gems are the paid currency: they are bought with real money from the Hypixel Store.¹ The only free ones are 75 Gems the first time you talk to Elizabeth, and 500 a month for players with the MVP++ rank.¹

They are spent at Elizabeth, on the Booster Cookie (325 Gems), Fire Sale items and speeding up Account & Profile Upgrades (1 Gem per 10 minutes by default). Seasonal skins, runes and dyes cost Gems at Taylor, and Barn skins at SkyMart (listed below).¹