Brianite
A variety of Minerals
What is Brianite?
Brianite is a phosphate mineral with the chemical formula Na2CaMg(PO4)2. It was first identified in an iron meteorite. This mineral is named after Brian Harold Mason (1917–2009), a pioneer in meteoritics. It was first reported from the Dayton meteorite in Montgomery County, Ohio in 1966. It occurs in phosphate nodules within the meteorite. Associated minerals include: panethite, whitlockite, albite, enstatite, schreibersite, kamacite, taenite, graphite, sphalerite and troilite.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Brianite 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.
Brianite Localities Map
See where Brianite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colorless
- Hardness (Mohs)
- 4 - 5
- Density
- 3.13 g/cm³
Chemical Properties
- Chemical Formula
- Na2CaMg(PO4)2
- Elements
- Ca, Mg, Na, O, P
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Brianite FAQs
How do I identify Brianite?
Brianite can be identified by its hardness of 4 - 5 on the Mohs scale, Colorless color. Look for these key characteristics when examining specimens.
What color is Brianite?
Brianite typically appears in Colorless. Color can vary depending on impurities and formation conditions.
How hard is Brianite?
Brianite has a hardness of 4 - 5 on the Mohs scale. This gives it moderate hardness.
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