Vote for your favorite mineral in #MinCup26! - Pyromorphite vs. Graphite
Linked by archaic translations and mineralogical misunderstandings, the quarterfinals are ending in hexagons with vivid pyromorphite vs writeable graphite.
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Biotite from
Diamond Rocks, Mourne Mountains, County Down, Northern Ireland, UK


Locality type:Occurrence
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:
Albite17
Topaz16
Quartz16
- var Smoky Quartz16
Beryl16
Orthoclase16
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Diamond Rocks, Mourne Mountains, County Down, Northern Ireland, UK
Data Identifiers
Mindat Occurrence Record ID:554697
Long-form Identifier:1:3:554697:8
GUID (UUID V4):0
References
Dr Richard Unitt (personal observation)
 
and/or  
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