A craftswoman applies gold leaf on picture frame at Arte Aurelia gold-plating workshop in Vienna, Austria, December 14, 2017.

Gold leaf-decorated Petit Fours D'or chocolates are seen at the bakery of Wenckeschmid patisserie in Basel, Switzerland December 14, 2017.

Business owner Faye makes final touches to a 24k edible gold leaf soft ice cream at her Small Potatoes Ice Creamery shop in Singapore December 12, 2017.

Business owner Faye prepares a 24k edible gold leaf soft ice cream at her Small Potatoes Ice Creamery shop in Singapore December 12, 2017.

Business owner Faye prepares a 24k edible gold leaf soft ice cream at her Small Potatoes Ice Creamery shop in Singapore December 12, 2017.

Confectioner Wencke Schmid of Wenckeschmid patisserie displays a gold leaf-decorated Petit Four D'or chocolate at her bakery in Basel, Switzerland December 14, 2017.

Confectioner Wencke Schmid of Wenckeschmid uses a brush to place gold leafs on Petit Fours D'or chocolates at her bakery in Basel, Switzerland December 14, 2017.

Gold leafs are seen at Arte Aurelia gold-plating workshop in Vienna, Austria, December 14, 2017.

Gold leaf-decorated Petit Fours D'or chocolates are seen at the bakery of Wenckeschmid patisserie in Basel, Switzerland December 14, 2017.

A craftswoman applies gold leaf on picture frame at Arte Aurelia gold-plating workshop in Vienna, Austria, December 14, 2017.

Gold leaf-decorated Petit Fours D'or chocolates are seen at the bakery of Wenckeschmid patisserie in Basel, Switzerland December 14, 2017.