abstract background blue grunge iron metal metals old oxide rust rusted rusting rusty steel structure texture wheathered green animal animals artificial backdrop bright brilliant crocodile fabric false glare gleam glow glowing grey imitated leather metallic mock outline plastic shine shiny silver skin snake structures textures wallpaper 79 Au aurum gilded gold golden goud guld oro ouro rich scratches surface wealth wealthy aged brown colour dirty grungy hue metalic rustic shade tone vintage color colored colors coloured colours construction irregular light plate reflections regular shape shapes shining bar building cladding colorful colourful drag link links machine machinery closeup macro turquoise