Vivianite is a mineral that belongs to the hydrated iron phosphate mineral group. It is composed of iron, phosphate, and water.
Vivianite typically occurs as blue to green-blue crystals or earthy masses. Its color can vary depending on impurities and exposure to light. It has a vitreous to pearly luster and a monoclinic crystal structure.
One interesting property of vivianite is its ability to change color upon exposure to light. Initially, freshly exposed vivianite crystals are colorless or pale yellow, but they gradually turn blue or green-blue when exposed to air and light due to the oxidation of iron within the mineral.
Vivianite is primarily valued as a collector's mineral due to its attractive color and unique properties. It is also occasionally used as a pigment in art and can be found in some archaeological artifacts. Additionally, vivianite has been studied for its potential use in environmental remediation, as it can absorb heavy metals and other contaminants from water.
Some people have been lovingly referring to Vivianite as the real-life necromancer stone