Iron rich handmade tiles are a substrate for a sand painting. White glaze is the ground on which the foraged sands from Coleman Beach, CA and found slag, rust, etc. is fused into through the firing process. Inspired by the sublime light quality in the painting, A Gorge in the Mountains (Kauterskill Cove) by Hudson River School painter Sanford Robinson Gifford, 1862.
https://www.metmuseum.org/art/collection/search/10946