How do I identify Piemontite?

Piemontite can be identified by its hardness of 6 - 6.5 on the Mohs scale, Red color. Look for these key characteristics when examining specimens.

What color is Piemontite?

Piemontite typically appears in Red, red-violet, red-brown to reddish black. Color can vary depending on impurities and formation conditions.

How hard is Piemontite?

Piemontite has a hardness of 6 - 6.5 on the Mohs scale. This gives it moderate hardness.

How to Identify Piemontite | Properties, Meaning & Uses

What is Piemontite?

Piemontite is a sorosilicate mineral in the monoclinic crystal system with the chemical formula Ca2(Al,Mn,Fe)3(SiO4)(Si2O7)O(OH). It is a member of the epidote group. Red to reddish-brown or red-black in colour, Piemontite has a red streak and a vitreous lustre. The type locality is the Prabornaz Mine, in Saint-Marcel, Aosta Valley, Italy. It occurs metamorphic rocks of the greenschist to amphibolite metamorphic facies and in low-temperature hydrothermal veins in altered volcanic rocks. It also occurs in metasomatized deposits of manganese ore. Associated minerals include: epidote, tremolite, glaucophane, orthoclase, quartz and calcite.

Piemontite Market Value Calculator

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

Piemontite Localities Map

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