Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Biotite from
Tantalite Hill pegmatite (Mercer's Find), Nepean, Coolgardie Shire, Western Australia, Australia


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
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Tantalite Hill pegmatite (Mercer's Find), Nepean, Coolgardie Shire, Western Australia, Australia
Data Identifiers
Mindat Occurrence Record ID:1033923
Long-form Identifier:1:3:1033923:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.5km (0.3 miles) ⓘLondonderry Li deposit, Nepean, Coolgardie Shire, Western Australia, Australia
6.1km (3.8 miles) ⓘNepean Ni Mine, Nepean, Coolgardie Shire, Western Australia, Australia
9.6km (6.0 miles) ⓘLord Bob Gold Mine, Gibraltar Goldfield, Coolgardie Shire, Western Australia, Australia
10.5km (6.5 miles) ⓘAshlar Pink Stone Quarry, Gibraltar Goldfield, Coolgardie Shire, Western Australia, Australia
10.5km (6.5 miles) ⓘQueen Victoria Rocks prospect, Coolgardie Shire, Western Australia, Australia
12.4km (7.7 miles) ⓘGibraltar Goldfield, Coolgardie Shire, Western Australia, Australia
12.5km (7.8 miles) ⓘBullabulling Gold Mine, Gibraltar Goldfield, Coolgardie Shire, Western Australia, Australia
12.6km (7.9 miles) ⓘLloyd George Gold Mine, Gibraltar Goldfield, Coolgardie Shire, Western Australia, Australia
16.7km (10.4 miles) ⓘTindals Gold Mine, Coolgardie, Coolgardie Shire, Western Australia, Australia
17.2km (10.7 miles) ⓘNew Australasian Gold Mine (Australasian; New Australasian Group), Coolgardie, Coolgardie Shire, Western Australia, Australia
References
Fetherston, J. Michael (2004) Tantalum in Western Australia. Mineral Resources Bulletin 22. Geological Survey of Western Australia
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 6, 2026 04:08:50
Go to top of page