About Rockbridgeite
An iron manganese phosphate, typically dark green to blackish, often fibrous. It's a grounding stone promoting strength and perseverance.
Primary Hues
Greenish-Black, Dark Green, Olive Green, forms fibrous or radiating masses
Geological & Scientific Details
Rockbridgeite is classified as a minerals mineral which typically crystallizes in the orthorhombic system. Its chemical formula is Fe2+Fe3+4(PO4)3(OH)5. Common crystal habits include euhedral crystals rare; typically fibrous in crusts, botryoidal and drusy masses.
Key Geological Properties:
- Mineral Category: Minerals
- Chemical Formula: Fe2+Fe3+4(PO4)3(OH)5
- IMA Symbol: Rkb[1]
- Crystal System: Orthorhombic
- Formula Mass (g/mol): 648.96 g/mol
- Predominant Geological Color: Varies from green, to black, to brownish green, to reddish brown
- Crystal Habit: Euhedral crystals rare; typically fibrous in crusts, botryoidal and drusy masses
- Twinning: Cruciform twins possible
- Cleavage: Perfect on {100}, Distinct on {010}, Distinct on {001}
- Luster: Vitreous to dull
- Streak: Greenish gray
- Diaphaneity: Subtranslucent
Associated Minerals
- Frondelite
- Barbosalite
- Dufrenite
- Vivianite
- Triphylite
- Lithiophilite