Aldermanite
A variety of Minerals
What is Aldermanite?
Aldermanite is a rare hydrated phosphate mineral with formula Mg5Al12(PO4)8(OH)22·32H2O. It's named after Arthur Richard Alderman (1901–1980), Professor of Geology and Mineralogy, University of Adelaide. Its type locality is Moculta Phosphate Quarry (Klemm's Quarry), Angaston, Barossa Valley, North Mount Lofty Ranges, Mount Lofty Ranges, South Australia, Australia.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Aldermanite 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.
Aldermanite Localities Map
See where Aldermanite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colorless in transmitted light
- Hardness (Mohs)
- 2
- Density
- 2.1 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Mg5Al12(PO4)8(OH)22 · 32H2O
- Elements
- Al, H, Mg, O, P
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Aldermanite FAQs
How do I identify Aldermanite?
Aldermanite can be identified by its hardness of 2 on the Mohs scale, Colorless in transmitted light color. Look for these key characteristics when examining specimens.
What color is Aldermanite?
Aldermanite typically appears in Colorless in transmitted light. Color can vary depending on impurities and formation conditions.
How hard is Aldermanite?
Aldermanite has a hardness of 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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