Gold
You earn gold from wins, and on iOS from level chests. Spend it to level up your cards.Gems
You earn gems by playing: ranked wins, badges, tournament rewards and invites, and on iOS from level chests. Spend them in the Store, for example on skins.Invites
On the web, the Invite page (in the sidebar, or under Profile on phones) tracks friends you bring to Chart Arena. Invites can earn gems, and the page shows the current requirements.Gems and gold are game items. They have no monetary value and can’t be sold, transferred or withdrawn.