Looking for some Rainbow Obsidian Products? Look no further than Keycap Quarry, check out our selection of nothing but the best products below: Rainbow Obsidian is a captivating gemstone that showcases a mesmerizing array of iridescent colors dancing across its dark surface. Formed from volcanic glass, this unique variety of obsidian captures the imagination with its shimmering play of colors, offering a glimpse into the hidden wonders of the Earth’s fiery origins.