Metavivianite
A variety of Minerals
What is Metavivianite?
Metavivianite (Fe2(PO4)2(OH)2·6H2O) is a hydrated iron phosphate mineral found in a number of geological environments. As a secondary mineral it is typically formed from oxidizing and dehydrated vivianite. Metavivianite is typically found as dark blue or dark green prismatic to flattened crystals. It was named by C. Ritz, Eric J. Essene, and Donald R. Peacor in 1974 for its structural relationship to vivianite.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Metavivianite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Quick Facts
Physical Properties
- Color
- Dark blue to blue-black; Dark green to green-black
- Hardness (Mohs)
- 1.5 - 2
- Rock tumbling
- Not recommended
- Density
- 2.69 g/cm³
- Streak
- Blue or greenish blue
Chemical Properties
- Chemical Formula
- Fe2+Fe3+2(PO4)2(OH)2 · 6H2O
- Elements
- Fe, H, O, P
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Metavivianite FAQs
How do I identify Metavivianite?
Metavivianite can be identified by its hardness of 1.5 - 2 on the Mohs scale, Dark blue to blue-black; Dark green to green-black color. Look for these key characteristics when examining specimens.
What color is Metavivianite?
Metavivianite typically appears in Dark blue to blue-black; Dark green to green-black. Color can vary depending on impurities and formation conditions.
How hard is Metavivianite?
Metavivianite has a hardness of 1.5 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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