Piemontite Information

Piemontite is a mineral species that belongs to the epidote group. It was first discovered in the Piedmont region of Italy, and was named after its place of discovery. Here is some information about piemontite:

Physical Properties

• Chemical formula: Ca2Fe3+Al2(SiO4)(Si2O7)O(OH)
• Color: brown, reddish brown, greenish brown, black
• Hardness: 6.5 - 7 on the Mohs scale
• Luster: vitreous to subresinous
• Streak: yellow-brown to orange-brown

Optical Properties

• Refractive index: nα = 1.734 - 1.743, nβ = 1.735 - 1.745, nγ = 1.745 - 1.755
• Birefringence: δ = 0.011 - 0.012
• Pleochroism: weak, yellowish brown to reddish brown

Ranking of Rarity

Piemontite is a relatively rare mineral, and is not commonly found in large quantities. It is ranked as a 7 out of 10 on the rarity scale.

Occurrence (countries)

Piemontite can be found in several countries around the world, including:

• Italy
• Switzerland
• USA
• Canada
• Japan
• New Zealand
• Tanzania

Healing Properties

Piemontite is believed to have healing properties for the heart and circulatory system. It is also thought to help with emotional balance and stability.

Uses

Piemontite is primarily used as a mineral specimen for collectors. It is also sometimes used as a gemstone, but is not commonly used in jewelry due to its rarity and high cost.