Sacrofanite
A variety of Minerals
What is Sacrofanite?
Sacrofanite is a rare silicate mineral that has the general formula of (Na,Ca)9(Si,Al)12O24(SO4,CO3,OH,Cl)4·n(H2O). It was approved as a mineral by the International Mineralogical Association in 1980. Its name comes from the Sacrofano Caldera in the Monti Sabatini from which it was discovered in Latium, Italy.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Sacrofanite 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.
Sacrofanite Localities Map
See where Sacrofanite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Sacrofanite
Sacrofanite is only found in the Sacrofano Caldera in Italy, yet it represents one of many new minerals found in Italian volcanoes. It can be found on display in The Mineralogical Museum at the University of Rome. It occurs as a crystal coating within a vug in a rock ejected from the volcano. Other minerals occurring in the rock include sanidine, andradite, fassaite, leucite and hauyne.
Quick Facts
Physical Properties
- Color
- colourless
- Hardness (Mohs)
- 5.5 - 6
- Streak
- white
Chemical Properties
- Chemical Formula
- (Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6•2H2O
- Elements
- Al, Ca, Cl, F, H, K, Na, O, S, Si
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Sacrofanite FAQs
How do I identify Sacrofanite?
Sacrofanite can be identified by its hardness of 5.5 - 6 on the Mohs scale, colourless color. Look for these key characteristics when examining specimens.
What color is Sacrofanite?
Sacrofanite typically appears in colourless. Color can vary depending on impurities and formation conditions.
How hard is Sacrofanite?
Sacrofanite has a hardness of 5.5 - 6 on the Mohs scale. This gives it moderate hardness.
What is the formation of sacrofanite of Sacrofanite?
Sacrofanite is only found in the Sacrofano Caldera in Italy, yet it represents one of many new minerals found in Italian volcanoes. It can be found on display in The Mineralogical Museum at the University of Rome. It occurs as a crystal coating within a vug in a rock ejected from the volcano. Other minerals occurring in the rock include sanidine, andradite, fassaite, leucite and hauyne.
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