Montgomeryite
A variety of Minerals
What is Montgomeryite?
Montgomeryite is a phosphate mineral with the chemical formula Ca4MgAl4(PO4)6(OH)4·12H2O. The mineral was discovered in Fairfield, Utah in a variscite nodule. Montgomeryite is a very rare mineral and can only be found in a few places in the world.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Montgomeryite 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.
Montgomeryite Localities Map
See where Montgomeryite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Dark green to light green, colourless, red, yellow
- Hardness (Mohs)
- 4
- Density
- 2.523 g/cm³
Chemical Properties
- Chemical Formula
- Ca4MgAl4(PO4)6(OH)4 · 12H2O
- Elements
- Al, Ca, H, Mg, O, P
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Montgomeryite FAQs
How do I identify Montgomeryite?
Montgomeryite can be identified by its hardness of 4 on the Mohs scale, Dark green to light green color. Look for these key characteristics when examining specimens.
What color is Montgomeryite?
Montgomeryite typically appears in Dark green to light green, colourless, red, yellow. Color can vary depending on impurities and formation conditions.
How hard is Montgomeryite?
Montgomeryite has a hardness of 4 on the Mohs scale. This gives it moderate hardness.
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