Mascagnite
A variety of Minerals
What is Mascagnite?
Mascagnite is a rare ammonium sulfate mineral (NH4)2SO4. It crystallizes in the orthorhombic system typically forming as stalactitic masses exhibiting good cleavage. It is soft (not higher than 2.5 on the Mohs Scale) and water-soluble. Optical properties are variable; the purest form is transparent and colorless, but opaque gray or yellow deposits are also known. It occurs in fumaroles, as at Mount Vesuvius and associated with coal seam fires. It was named for Italian anatomist Paolo Mascagni (1752–1815) who first described the mineral.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Mascagnite 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.
Mascagnite Localities Map
See where Mascagnite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless, grey, yellowish-grey, yellow; colourless in transmitted light
- Hardness (Mohs)
- 2 - 2.5
- Density
- 1.769 g/cm³
Chemical Properties
- Chemical Formula
- (NH4)2SO4
- Elements
- H, N, O, S
Also Known As
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Mascagnite FAQs
How do I identify Mascagnite?
Mascagnite can be identified by its hardness of 2 - 2.5 on the Mohs scale, Colourless color. Look for these key characteristics when examining specimens.
What color is Mascagnite?
Mascagnite typically appears in Colourless, grey, yellowish-grey, yellow; colourless in transmitted light. Color can vary depending on impurities and formation conditions.
How hard is Mascagnite?
Mascagnite has a hardness of 2 - 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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