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Muscovite from
Cactus Jack pegmatite, Burnet County, Texas, USA


00788150017367882366935.jpg
Muscovite

Cactus Jack pegmatite, Burnet County, Texas, USA
00788150017367882366935.jpg
Muscovite

Cactus Jack pegmatite, Burnet County, Texas, USA
06736240017367882362269.jpg
Muscovite

Cactus Jack pegmatite, Burnet County, Texas, USA
Locality type:Pegmatite
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Comments:Occurs as tapered columns of curved tetragonal flakes to 3cm length, 1-2cm girth. This variety is also known as "ball-peen" mica due to its resemblance to decorative hammered metal.
Habit:Tetragonal, tapering foliated columnar, curved faces
Colour:Metallic silver with black mottling
Luminescent properties:None
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Confirmed
Confirmation Methods:SEM-EDS
Associated Minerals Based on Photo Data:
Monazite-(Ce)3
Xenotime-(Yb)2
Uraninite1
Zircon1
- var Hafnian Zircon1
Uranophane1
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Cactus Jack pegmatite, Burnet County, Texas, USA
Data Identifiers
Mindat Occurrence Record ID:429681
Long-form Identifier:1:3:429681:2
GUID (UUID V4):0
References
F Roberts, 2006
 
and/or  
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