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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Colemanite from
Columbus Mine, Lockwood Valley, Lake of the Woods area, Ventura County Borate Mining District (Stauffer Mining District), Ventura County, California, USA


Locality type:Mine
Classification
Species:Colemanite
Formula:Ca[B3O4(OH)3] · H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Colemanite data
Locality Data:Click here to view Columbus Mine, Lockwood Valley, Lake of the Woods area, Ventura County Borate Mining District (Stauffer Mining District), Ventura County, California, USA
Data Identifiers
Mindat Occurrence Record ID:336102
Long-form Identifier:1:3:336102:3
GUID (UUID V4):0
Nearest other occurrences of Colemanite
0.8km (0.5 miles) ⓘRussell Mine, Lockwood Valley, Lake of the Woods area, Ventura County Borate Mining District (Stauffer Mining District), Ventura County, California, USA
1.0km (0.6 miles) ⓘUnnamed Borate prospects [1], Lockwood Valley, Lake of the Woods area, Ventura County Borate Mining District (Stauffer Mining District), Ventura County, California, USA
2.1km (1.3 miles) ⓘFrazier Mine (Frazier Borax Mine), Lockwood Valley, Lake of the Woods area, Ventura County Borate Mining District (Stauffer Mining District), Ventura County, California, USA
4.6km (2.9 miles) ⓘBitter Creek Borate Workings Mine (Bitter Creek claim; Bitter Crick placer claim; Merrill claim; Comet claim; Climax claim; Gridiron Placer Mining claim; Bueno claim), Lockwood Valley, Lake of the Woods area, Ventura County Borate Mining District (Stauffer Mining District), Ventura County, California, USA
5.9km (3.7 miles) ⓘIves tunnel, Lockwood Valley, Lake of the Woods area, Ventura County Borate Mining District (Stauffer Mining District), Ventura County, California, USA
6.0km (3.7 miles) ⓘMiddle Fork Creek Borate deposits (Jumbo claim; Gib claim; Center Creek claim; Baldwin claim; Mammoth claim), Lockwood Valley, Lake of the Woods area, Ventura County Borate Mining District (Stauffer Mining District), Ventura County, California, USA
7.0km (4.4 miles) ⓘStubblefield & Halloway property, Lockwood Valley, Lake of the Woods area, Ventura County Borate Mining District (Stauffer Mining District), Ventura County, California, USA
36.5km (22.7 miles) ⓘUnnamed Borate prospects [2], Ojai, Ventura County, California, USA
72.1km (44.8 miles) ⓘLang Mine, Tick Canyon Borate deposit, Tick Canyon, Lang, Los Angeles County, California, USA
74.0km (46.0 miles) ⓘLang, Los Angeles County, California, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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