Vote for your favorite mineral in #MinCup26! - Cuprite vs. Orpiment
It's a fiery match of vibrant red Cuprite and just as saturated orange Orpiment battle for your votes!
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
Bayleys Reward Gold Mine, Coolgardie, Coolgardie Shire, Western Australia, Australia


Locality type:Mine
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 Bayleys Reward Gold Mine, Coolgardie, Coolgardie Shire, Western Australia, Australia
Data Identifiers
Mindat Occurrence Record ID:939706
Long-form Identifier:1:3:939706:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.7km (0.4 miles) ⓘLindsays Gold Mine (Queens Cross), Coolgardie, Coolgardie Shire, Western Australia, Australia
0.9km (0.6 miles) ⓘKings Cross Gold Mine, Coolgardie, Coolgardie Shire, Western Australia, Australia
2.5km (1.5 miles) ⓘGreenfields Mine (Caledonia Gold Mine; Three Mile Hill), Coolgardie, Coolgardie Shire, Western Australia, Australia
5.0km (3.1 miles) ⓘTindals Gold Mine, Coolgardie, Coolgardie Shire, Western Australia, Australia
5.2km (3.2 miles) ⓘNew Australasian Gold Mine (Australasian; New Australasian Group), Coolgardie, Coolgardie Shire, Western Australia, Australia
6.2km (3.9 miles) ⓘMcPherson's Reward Gold Mine (Macphersons Reward), Coolgardie, Coolgardie Shire, Western Australia, Australia
9.0km (5.6 miles) ⓘMungari Emerald deposit, Coolgardie, Coolgardie Shire, Western Australia, Australia
9.2km (5.7 miles) ⓘBonnievale Gold Mine (Westralia; Varischetti), Coolgardie, Coolgardie Shire, Western Australia, Australia
9.4km (5.8 miles) ⓘMungari Grey Quarries (Mungari Grey 1; Mungari Grey 2), Coolgardie, Coolgardie Shire, Western Australia, Australia
11.8km (7.4 miles) ⓘLord Bob Gold Mine, Gibraltar Goldfield, Coolgardie Shire, Western Australia, Australia
References
Witt, W.K., Groves, D.I., Ho, S.E. (eds.) (1994) Ore Deposits of the Eastern Goldfields, Western Australia. Excursion Guidebook No. 8, Guidebook for the post-convention excursion, 12th Australian Geological Convention, September 1994.
 
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 5, 2026 07:20:57
Go to top of page