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Biotite from
Petrick pegmatite, Kingsland Granite Company Quarry (Petrick Quarry), Llano County, Texas, USA


06002360017362358572609.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
05720630017272029016253.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
03787770017272029025140.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
03649970017272029037605.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
06002360017362358572609.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
03171250017362358583799.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
06323470017362358581253.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
00197680017362358596622.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
04506440017362358594258.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
05720630017272029016253.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
03787770017272029025140.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
03649970017272029037605.jpg
Biotite, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
Locality type:Pegmatite
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Fluorite10
- var Chlorophane1
Fergusonite-(Y)7
Microcline6
Quartz4
- var Milky Quartz2
K Feldspar1
- var Adularia1
Gadolinite1
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Petrick pegmatite, Kingsland Granite Company Quarry (Petrick Quarry), Llano County, Texas, USA
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:400385
Long-form Identifier:1:3:400385:4
GUID (UUID V4):0
References
Self-collected by Franklin Roberts.
Arthur Smith, Frank Roberts, Denise Bicknell (2008) Mineral News, 24, #1, 6-7.
 
and/or  
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