About Vivianite
A hydrated iron phosphate, initially colorless but oxidizes to deep blue or greenish-blue upon light exposure. It's a stone of peace, compassion, and deep intuition, aiding in goal setting and removing negativity from one's energy field.
Primary Hues
Colorless (fresh), Dark Blue to Greenish-Blue (on exposure to light)
Geological & Scientific Details
Vivianite is classified as a phosphate mineral vivianite group mineral which typically crystallizes in the monoclinic system. Its chemical formula is Fe2+3(PO4)2·8H2O. Common crystal habits include flattened, elongated prismatic crystals, may be rounded or corroded; as stellate groups, incrustations, concretionary, earthy or powdery.
Key Geological Properties:
- Mineral Category: Phosphate mineral Vivianite group
- Chemical Formula: Fe2+3(PO4)2·8H2O
- IMA Symbol: Viv[1]
- Crystal System: Monoclinic
- Formula Mass (g/mol): 501.61 g/mol
- Predominant Geological Color: Colorless, very pale green, becoming dark blue, dark greenish blue, indigo-blue, then black with oxidation
- Crystal Habit: Flattened, elongated prismatic crystals, may be rounded or corroded; as stellate groups, incrustations, concretionary, earthy or powdery
- Twinning: Translation gliding
- Cleavage: Perfect on {010}
- Luster: Vitreous, pearly on the cleavage, dull when earthy
- Streak: White, altering to dark blue, brown
- Diaphaneity: Transparent to translucent