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Piemontite

#AH51643
SOLD
Piemontite from Picuris Range, Glenwoody dist., Taos Co., New Mexico, United States - AH51643
Piemontite from Picuris Range, Glenwoody dist., Taos Co., New Mexico, United States - AH51643

Piemontite

#AH51643
Availability
Sold
Size
7 x 5 x 3 cm - Sm Cabinet 
Formula
Ca2Mn3+Al2(Si2O7)(SiO4)O(OH) (RRUFF)
Locality
Picuris Range, Glenwoody dist., Taos Co., New Mexico, United States

Rich mass of bright red Piemontite, which is a member of the Epidote group, which contains at least 40% Mn(+3).

Piemontite

Formula
Ca2Mn3+Al2(Si2O7)(SiO4)O(OH) 
Crystal System
Monoclinic 
Crystal Habit
Blocky, Prismatic, Massive - Granular 
Cleavage
Good, Distinct, None 
Luster
Vitreous (Glassy) 
Color
yellow, carmine red, red, reddish brown, reddish black 
Streak
red 
Class
Monoclinic - Prismatic 
Fracture
Splintery 
Hardness
6-7 

Data courtesy of Webmineral.

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