wichita.edu
…whether it be stone, marble, or precious gemstone material I work with. In essence, I adapt to all things, transforming into crimson with red earth, taking on a verdant hue with green, adopting a regal purple with purple, and acquiring a resplendent gold radiance when mingling with gold. I assume a golden sheen with yellow, and whatever tint I apply to…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/IterII/IterExII_01_Dialog1.php