lapis lazuli blue การใช้

This was followed by Lapis Lazuli blue and Mandarin Yellow.
In 1990 the painted part was found to contain the precious and ( for the time ) expensive use of lapis lazuli blue.
Many of the unfinished parts of the painting, such as the cloak of the missing Virgin, would have required quantities of the expensive lapis lazuli blue.
It is composed of iron gall inks, various pigment including the expensive and rare lapis lazuli blue mixed with gum arabic, and three kinds of gold including gold emulsion and burnished gold leaf on vellum.