Viridian - ColourLex

An extensive collection of information on the properties, preparation, and use of viridian. It was frequently employed by the Impressionists.

ColourLex – Lines and Colors

Viridian - Wikipedia

NationStates, Dispatch

The Color of Art Pigment Database: Pigment Green - PG

viridian – Cultural Heritage Science Open Source

Discover the Rare and Vibrant Pigments of Harvard's Forbes Pigment

Viridian - ColourLex

Vibrant Yellow Orpiment Pigment

Cadmium Yellow — The Art Supply Depo Sylvania + Bowling Green

Free Photo, Surface yellow solid rough stained