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Rossmanite

#PD45069

Rossmanite

#PD45069
Availability
Sold
Size
6 x 5 x 2.5 cm - Sm Cabinet 
Formula
□(Al2Li)Al6(Si6O18)(BO3)3(OH)4 (RRUFF)
Locality
Dorothy Pit, Whitemoor, St Austell District, Cornwall, England

The pinkish portions of this specimen is probably the Rossmanite. This specimen is somewhat similiar to that of G. Rolands' on Mindat. I would guess the tourmaline is phased and changes to an elbaite. 

Rossmanite

Formula
[ ](Al2Li)Al6(Si6O18)(BO3)3(OH)4 
Crystal System
Trigonal 
Crystal Habit
Columnar, Crystalline - Coarse, Striated 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
pink, pale pink 
Streak
white 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Brittle 
Hardness

Data courtesy of Webmineral.

Collection
Phillips Collection

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