Folded from elephant hide paper. I've used multiple layers to get the surface effect - Starting with a textured gesso, then teal and green acrylic paint and bronze and raw umber detailing. I finished it with a semi-transparent turquoise enamel glaze, which gives the mask the appearance of glazed ceramic. I had to take several pictures in different lighting to try and represent to effect - in person you can see a lot going on with all the layers, and it's difficult to capture in a photograph.