procedural crystal cavern marble with amethyst and quartz clusters on basalt, ed for spelunking expedition textures, evoking

crystal cavern marble amethyst quartz clusters basalt spelunking expedition texture underground minerals geology rock natural gemstone polished smooth highend premium refined rugged unique geological cave stone nature intricate geologicaldesign luxury modern refinedstyle earthy sophisticated dark mineralscapes undergroundart caveart stonework geologicalpattern naturalstone reflective naturaldesign rich rough luxurious smoothfinish artistic rare