Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of 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

Mcallisterite from
Mott prospect (Mott Colemanite prospect; Mott open cut), Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA


Locality type:Prospect
Classification
Species:Mcallisterite
Formula:Mg2[B6O7(OH)6]2 · 9H2O
Comments:Occurs as a minor constituent of efflorescence layer of fine-grained borates near weathered outcrops of colemanite and priceite. Small pellets 1 to 2 mm diameter.
Colour:White
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Mcallisterite data
Locality Data:Click here to view Mott prospect (Mott Colemanite prospect; Mott open cut), Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Data Identifiers
Mindat Occurrence Record ID:149233
Long-form Identifier:1:3:149233:0
GUID (UUID V4):0
Nearest other occurrences of Mcallisterite
1.6km (1.0 miles) ⓘSouth Meridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
1.6km (1.0 miles) ⓘMeridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
8.8km (5.5 miles) ⓘHard Scramble claim, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
23.5km (14.6 miles) ⓘEagle Borax Spring, Inyo County, California, USA
References
Schaller, Waldemar T., Vlisidis, Angelina C., Mrose, and Mary E. (1965) Macallisterite, 2MgO·6B2O3·15H2O, a new hydrous magnesium borate mineral from the Death Valley region, Inyo County, California. American Mineralogist, 50 (5-6) 629-640
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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 3, 2026 11:01:27
Go to top of page