Vivianite is a rare phosphate mineral prized by collectors for its distinctive deep blue coloration and monoclinic crystal structure. This raw specimen showcases the mineral's natural formation, featuring the characteristic azure to indigo hues that develop through iron oxidation. Vivianite typically forms in sedimentary environments and oxidized ore deposits, making pristine examples increasingly sought after. Each raw piece is unique, displaying natural variations in color intensity and crystal clarity. Ideal for mineral enthusiasts, collectors, and those studying crystallography or geological formations.