How do I identify Zwieselite?

Zwieselite can be identified by its hardness of 5 - 5.5 on the Mohs scale, Dark brown; black (altered) color. Look for these key characteristics when examining specimens.

What color is Zwieselite?

Zwieselite typically appears in Dark brown; black (altered). Color can vary depending on impurities and formation conditions.

How hard is Zwieselite?

Zwieselite has a hardness of 5 - 5.5 on the Mohs scale. This gives it moderate hardness.

Zwieselite

A variety of Triplite Group

What is Zwieselite?

Zwieselite Market Value Calculator

Estimate the market value of Zwieselite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Zwieselite Localities Map

See where Zwieselite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview

North ZoneCentral RidgeSouth Basin

Quick Facts

Physical Properties

Color: Dark brown; black (altered)
Hardness (Mohs): 5 - 5.5
Density: 3.92 g/cm³
Streak: White to tan

Chemical Properties

Chemical Formula: Fe2+2(PO4)F
Elements: F, Fe, O, P

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