A Living gemstone creature with a multifaceted crystalline body resembling a rough-cut emerald yet organic, sprouting delicate mineral tendrils like roots that anchor into obsidian volcanic rock, translucent internal veins pulsing with molten golden sap, surrounded by tiny ancient arthropod fossils trapped in its crystalline structure, scientific field notes cross-section view revealing growth rings and mineral composition, palette of deep emerald green, brilliant gold, obsidian black and pale celadon, Victorian natural history geological illustration aesthetic