Collection: Vivianite

Vivianite, a hydrated iron phosphate mineral, is discovered in various geological settings. The presence of calcium, manganese, and magnesium may replace iron in its structure. While pure vivianite lacks color, it readily oxidizes, leading to a transformation in coloration. Typically, it manifests as prismatic to flattened crystals in deep blue or deep bluish-green hues.

Notably, vivianite crystals are frequently encountered within fossil shells, particularly those belonging to bivalves and gastropods, or they may be affixed to fossilized bone structures.