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!
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Wightmanite from
Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA


00080540017272024447498.jpg
Wightmanite

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
03484900017581226713686.jpg
Wightmanite, etc.

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
02388630017272024458652.jpg
Wightmanite

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
09690710017577911318979.jpg
Wightmanite

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
00080540017272024447498.jpg
Wightmanite

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
01700890017580696545265.jpg
Wightmanite, etc.

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
02388630017272024458652.jpg
Wightmanite

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
09168020017372674804242.jpg
Wightmanite

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
00036950017272024471610.jpg
Wightmanite

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
08517290017581226713139.jpg
Wightmanite, etc.

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
02388630017272024458652.jpg
Wightmanite

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
03659050017577911327527.jpg
Wightmanite

Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
Locality type:Quarry
Classification
Species:Wightmanite
Formula:Mg5(BO3)O(OH)5 · 2H2O
Comments:Occurs as single prisms or radiating clusters of crystals in crystalline limestone in the contact zone on the 910 level.
Confirmation
Validity:Valid - Type Locality
Associated Minerals:
Associates:Dolomite
Fluoborite
Ludwigite
Associated Minerals Based on Photo Data:
Dolomite1
Data
Mineral Data:Click here to view Wightmanite data
Locality Data:Click here to view Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:688465
Long-form Identifier:1:3:688465:9
GUID (UUID V4):0
References
Murdoch, Joseph (1962) Wightmanite, a new borate mineral from Crestmore, California. American Mineralogist, 47 (5-6) 718-722
Segnit, E. R., Lancucki, C. J. (1963) Fluoborite from Crestmore, California. American Mineralogist, 48 (5-6) 678-682
Moore, Paul Brian, Araki, and Takaharu (1974) Pinakiolite, Mg2Mn3+O2[BO3]; warwickite, Mg(Mg0.5Ti0.5)O[BO3]; wightmanite, Mg5(O)(OH)5[BO3]·nH2O: Crystal chemistry of complex 3 Å wallpaper structures. American Mineralogist, 59 (9-10) 985-1004
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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