Rainbow Obsidian 10mmRainbow obsidian has a captivating spectrum of colors, typically including vibrant greens, purples, reds, and golds. The specific colors and their intensity can vary depending on the size and distribution of magnetite inclusions within the stone. Rainbow obsidian typically has a vitreous luster, meaning it has a glassy, shiny appearance. The iridescence adds a unique, almost metallic quality to its luster. The iridescence of rainbow obsidian is a