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0 item @ $0.00  

Boromuscovite

#PD34817
SOLD
Boromuscovite from Little Three mine, San Diego Co., California, United States - PD34817
Boromuscovite from Little Three mine, San Diego Co., California, United States - PD34817

Boromuscovite

#PD34817
Availability
Sold
Size
Chip < 1cm 
Formula
KAl2(Si3B)O10(OH)2 (RRUFF)
Locality
Little Three mine, San Diego Co., California, United States

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Dioctahderal. Perhaps the only mica with essential boron, which subtitutes for aluminum in the silicate tetrahedron. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Originally found at this locality as an alteration coating after pocket rupture (Handbook of Mineralogy).

This is a small 4mm piece.

Type Locality

Boromuscovite

Formula
KAl2(Si3B)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Fine, Massive - Fibrous 
Cleavage
Perfect, None, None 
Luster
Vitreous - Dull 
Color
white, beige white 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
2.5-3 

Data courtesy of Webmineral.

Collection
Phillips Collection
Special Info
Type Locality

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