Vonium

"As you can see, many of these droids were gilded in precious metals such as silver, gold or even vonium."

- A Toong guide at the droid museum on Nubia

Vonium was a precious metal. Some droids displayed in the Kentas gallery of the droid museum on Nubia were gilded in vonium.

Behind the scenes
In the Star Wars canon, vonium was first mentioned in the comic book Star Wars Adventures Free Comic Book Day 2019, which was written by Cavan Scott and published in 2019. In the Star Wars Legends continuity, vonium was first mentioned in "Snow Job," an article written by Daniel Kaufman and published in 2000.