This currency changes with every new season in the game.
Spring (March - May): Daffodils

Summer (June - August): Pearls

Fall (September - November): Candy

Winter (December - February): Glass Baubles

All remaining currency will be converted to the next type once the new season comes.
Current seasonal currency is Pearls
Buildings that drop Pearls so far (this list will be extended during the season):
Buildings that will drop pearls at the beginning of the season:
Exhibitions of the Archeological Museum (Maximum number of rooms to be exhibited 3)
Egyptian Costume: 1 pearl every 24 hours
Sarcophagus: 2 pearls every 24 hours
Colosseum: 2 pearls every 24 hours
Diana statue: 1 pearl every 24 hours
Legion’s Banner: 1 pearl every 24 hours
Meditating Buddha: 2 pearls every 24 hours
Ganesha: 3 pearls every 24 hours
Exquisite saree: 1 pearl every 24 hours
Hanging scroll “Bamboo”: 1 pearl every 24 hours
Jade Dragon: 3 pearls every 24 hours
Temple Of Heaven: 2 pearls every 24 hours
Mayan Hieroglyphs: 1 pearl every 24 hours
“Seated King” incense burner: 3 pearls every 24 hours
Temple of Kukulcan: 2 pearls every 24 hours
Dodo in the nest: 1 pearl every 24 hours
Santa Reindeer Portrait: 2 pearls every 24 hours
Cup “Honorary member of the club”: 3 pearls every 24 hours
Scandinavian Saga: 1 pearl every 24 hours
Drakkar reproduction: 3 pearls every 24 hours
Bamberg box: 2 pearls every 24 hours
Samurai helmet: 1 pearl every 24 hours
Himeji Castle: 2 pearls every 24 hours
Maneki-neko: 3 pearls every 24 hours
Lozi people bowl: 1 pearl every 24 hours
Great mosque of Djenne: 2 pearls every 24 hours
Luba people statue: 3 pearls every 24 hours
Decorated Russian doll: 3 pearls every 24 hours
St. Basil’s Cathedral: 2 pearls every 24 hours
Monomakh’s cap: 1 pearl every 24 hours
St. Peter's cathedral: 2 pearls every 24 hours
Armillary sphere: 1 pearl every 24 hours
Statue of Moses: 3 pearls every 24 hours
Gold dish: 1 pearl every 24 hours
Solomon's temple: 2 pearls every 24 hours
City Sights
Lighthouse: 1-2 pearls every 24 hours
Konbini: (only 90 days after placement on the map) 1-3 pearls every 24 hours
Festive confectionery: 1-3 pearls every 24 hours
Fish Market: (only 90 days after placement on the map) 1-3 pearls every 24 hours
ATV rental: (only 90 days after placement on the map) 1-3 pearls every 24 hours
Penguins on ice: ( ONLY for 90 days after placing it on the map) 1-3 pearls every 24 hours
Phoenician House: 2-5 pearls every 22 hours
Solomon's Temple: 3-4 pearls every 22 hours
Golden Phoenician Vase: 1-3 pearls every 24 hours for 16 days
Bosco Verticale: 1-4 pearls every 24 hours
Royal Portuguese Cabinet of Reading: 1-3 pearls every 23 hours
Nobel Prize Museum: 1-4 pearls every 24 hours
Cologne Central Mosque: 1-3 pearls every 24 hours
National museum of Finland: 1-4 pearls every 24 hours
Achilleion: 1-3 pearls every 23 hours
Sirkesi Railway Station: 2-3 pearls every 24 hours
Vadstena Castle: 1-4 pearls every 24 hours
Saint Joseph's Oratory: 1-3 pearls every 23 hours
Camel Tent : (only 90 days after placement on the map) 1-3 pearls every 24 hours
Radio station "Guitar Riff": 3-6 pearls every 24 hours
Beach rescue base: 1 pearl every 20 hours
Car park: 1 pearl every 24 hours
Summer airplane: 1-2 pearls every 20 hours
Surfer bungalow: 2-3 pearls every 16 hours
"Melodic Wave" beach club: 3-4 pearls every 12 hours
Rocker music shop: 1-3 pearls every 24 hours
Surfer music shop: 2-3 pearls every 24 hours
Artificial wave machine: 2-3 beads every 24 hours
Roadside diner: 1-4 pearls every 24 hours
Cour d'honneur of Pierrefonds Castle: 1-4 pearls every 24 hours
Pierrefonds Castle wall : 2-3 pearls every 23 hours
Puppet Theatre: 1-3 pearls every 24 hours
Saint Martin Church: 1-4 pearls every 24 hours
St. Regis New York: 1-4 pearls every 24 hours
Monticello: 2-3 pearls every 23 hours
Unusual Exhibits: 2 pearls immediately as soon as you complete it
Spirit of Halloween: 3 pearls and immediately as soon as you complete it
Banners of the archaeological expedition "Phoenician Treasure"
Buildings and rewards of the calendar quest "Spring Festival"