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0 item @ $0.00  

Augite with Biotite

#PD32813

Augite with Biotite

#PD32813
Availability
Sold
Size
2.5 x 4 x 2 cm - Miniature 
Formula
(Ca,Mg,Fe)2(Si,Al)2O6 (RRUFF)
Locality
Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy
Tagged
antique

Piece of volcanic rock covered with thin brown micaceous crystals of possible Biotite to 2mm and tiny equant brown possible Augite to <1mm.

The old label accompanying this piece is handwritten and somewhat illegible and it's German, but my best guess is Augite. The label is from Wilhelm Maucher (Maucherite), a prominet early 20th century mineral dealer from Germany. Also, the address Schellingstr 73 on the label dates it post 1909, but no later than 1944 since the building was destroyed by allied bombing.

Antique Specimen

Augite

Formula
(Ca,Mg,Fe)2(Si,Al)2O6 
Crystal System
Monoclinic 
Crystal Habit
Massive - Fibrous, Columnar, Granular 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous - Resinous 
Color
brown green, green, light brown, dark brown, black 
Streak
greenish gray 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
5-6.5 

Data courtesy of Webmineral.

Collection
Phillips Collection
Special Info
Antique Specimen

W. Maucher label circa 1909-1944

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