Shafts of pastel light and clouds of pinfire illuminate miniature caverns inside a precious opal. Play of Color is a term mineralogists use to refer to the unique way lightwaves get refracted inside an opal, generating fluctuating colors. The screen shows a 3-millimeter wide area of the gem. This video was made in collaboration with mineralogist and photomicrographer, Danny Sanchez. Original score by KRON.