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Anorthite with garnet and hornblende

#PD50680
SOLD
Anorthite from Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy - PD50680
Anorthite from Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy - PD50680

Anorthite with garnet and hornblende

#PD50680
Availability
Sold
Size
6 x 4 x 3.5 cm - Sm Cabinet 
Formula
CaAl2Si2O8 (RRUFF)
Locality
Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy

This is an antique specimen with an old label from the University of Amsterdam. The old label, unfortunately, names the dark red crystals Sphalerite. It is not Sphalerite, but rather a garnet. The forms and hardness gives this away......always question identification (yes, even mine) everyone makes mistakes. That's what makes this hobby fun. The clear crystals are very nice Anorthite which is associated with green prisms of hornblende.

Anorthite

Formula
CaAl2Si2O8 
Crystal System
Triclinic 
Crystal Habit
Granular, Euhedral Crystals, Striated 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
colorless, gray, white, red, reddish gray 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Uneven 
Hardness
6 

Data courtesy of Webmineral.

Collection
Don Phillips Collection
Mineralpedia
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