This material is used to highlight a section of a painting that is next to 
This material is used to highlight a section of a painting that is next to a "Chorus of Paradise Angels" and depicts the words "This Kiss Is For the Whole World!" This material was used for the central portion of a painting that depicts masculinity with black squares and femininity with colorful ovals. It was also used extravagantly throughout a painting that shows many eyes on the dress of Adele Bloch-Bauer. This material was used as the background for many paintings by medieval artists like Duccio and Cimabue, and it was also used for halos until much later. For 10 points, name this material used in many of Gustav Klimt's paintings, which is made by pounding a precious metal into very thin layers.
This material is used to highlight a section of a painting that is next to a "Chorus of Paradise Angels" and depicts the words "This Kiss Is For the Whole World!"
gold leaf [prompt on just "gold" until mentioned; do not accept "gold foil"]