How do I identify Cafarsite?

Cafarsite can be identified by its hardness of 5.5 - 6 on the Mohs scale, Dark brown color. Look for these key characteristics when examining specimens.

What color is Cafarsite?

Cafarsite typically appears in Dark brown. Color can vary depending on impurities and formation conditions.

How hard is Cafarsite?

Cafarsite has a hardness of 5.5 - 6 on the Mohs scale. This gives it moderate hardness.

How to Identify Cafarsite | Properties, Meaning & Uses

What is Cafarsite?

Cafarsite (Ca8(Ti,Fe,Fe,Mn)6–7(AsO3)12·4H2O) is a rare calcium iron arsenite mineral. Manganese and titanium occur with iron in the formula. It was first described in 1966 for an occurrence in the Binn Valley, Valais, Switzerland. Its name is from the composition, calcium, ferrum (iron), and arsenic. It has also been reported from Piedmont, Italy and the Hemlo gold mine in the Thunder Bay District, Ontario, Canada.

Cafarsite Market Value Calculator

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

Cafarsite Localities Map

See where Cafarsite 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
Hardness (Mohs): 5.5 - 6
Density: 3.5 g/cm³
Streak: Yellow-brown

Chemical Properties

Chemical Formula: Ca5.9Mn1.7Fe3Ti3(AsO3)12 · 4-5H2O Chemical formula soon to be changed to either Ca16(Na,Fe2+,REE)(Ti,Fe3+,Fe2+,Mn2+,Al)16(AsO3)28F or Ca16(Na,Fe2+,REE)(Ti,Fe3+,Al)12(Fe2+,Mn)4(AsO3)28F. Fluorine is essential.
Elements: As, Ca, Fe, H, Mn, O, Ti

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