Marbled Paper Designs by Various Artists. All images come from the University of Washington Decorated and Decorative Paper Collection. First image: Vintage c. marbled paper, Spanish moiré on Turkish with Gold vein pattern. Vintage c.
Bumblebee jasper from Indonesia. "This material is harvested near the steaming calderas of Mount Papandayan, an active volcano, where . native sulfur" helps produce "the vivid yellow colors." Caption from link