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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Gypsum from
Red Knob Mine (Red Knob prospect; Red Knob claims), Muggins Mountains uranium prospects, Muggins Mining District, Muggins Mountains, Yuma County, Arizona, USA


Locality type:Mine
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Carnotite
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Red Knob Mine (Red Knob prospect; Red Knob claims), Muggins Mountains uranium prospects, Muggins Mining District, Muggins Mountains, Yuma County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:248653
Long-form Identifier:1:3:248653:6
GUID (UUID V4):0
Nearest other occurrences of Gypsum
18.2km (11.3 miles) ⓘTraeger Mine (Traeger prospect; Agate Mine), Las Flores Mine group, U.S. Army Yuma Proving Grounds, Laguna Mining District (Las Flores Mining District), Laguna Mts (San Pablo Mts), Yuma County, Arizona, USA
18.2km (11.3 miles) ⓘLas Flores Mine group, U.S. Army Yuma Proving Grounds, Laguna Mining District (Las Flores Mining District), Laguna Mts (San Pablo Mts), Yuma County, Arizona, USA
18.2km (11.3 miles) ⓘGolden Queen Mine, Las Flores Mine group, U.S. Army Yuma Proving Grounds, Laguna Mining District (Las Flores Mining District), Laguna Mts (San Pablo Mts), Yuma County, Arizona, USA
18.4km (11.4 miles) ⓘIndia Mine (India claim), Las Flores Mine group, U.S. Army Yuma Proving Grounds, Laguna Mining District (Las Flores Mining District), Laguna Mts (San Pablo Mts), Yuma County, Arizona, USA
18.4km (11.5 miles) ⓘPandino Mine (Pandino claim; Panadero Mine), Las Flores Mine group, U.S. Army Yuma Proving Grounds, Laguna Mining District (Las Flores Mining District), Laguna Mts (San Pablo Mts), Yuma County, Arizona, USA
20.3km (12.6 miles) ⓘLaguna Mining District (Las Flores Mining District), Laguna Mts (San Pablo Mts), Yuma County, Arizona, USA
21.2km (13.2 miles) ⓘCastle Dome Mining District, Castle Dome Mountains, Yuma County, Arizona, USA
23.3km (14.5 miles) ⓘGila Mountains Mica deposit, Fortuna Mine area, Barry M. Goldwater Air Force Range, Fortuna Mining District (La Fortuna Mining District), Yuma County, Arizona, USA
33.0km (20.5 miles) ⓘSenora Mine (Señora Mine; Senora Mine group; Señora claims; Linda group), Haack Mine group, Castle Dome Mine group, Castle Dome Mining District, Castle Dome Mountains, Yuma County, Arizona, USA
34.4km (21.4 miles) ⓘLast Chance Mine, Last Chance-Copper Coin Mine group (Smith Mine), Barry M. Goldwater Air Force Range, Copper Mountains, La Posa Mining District (Wellton Mining District; Wellton Hills Mining District), Wellton Hills-Copper Mountains, Yuma County, Arizona, USA
References
Outerbridge, W. F., Staatz, M. H., Meyrowitz, R., Pommer, A. M. (1960) Weeksite, a new uranium silicate from the Thomas Range, Juab County, Utah. American Mineralogist, 45 (1-2) 39-52
Anthony, John W.; Williams, Sidney A.; Bideaux, Richard A.; Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.pages 127, 155, 418
 
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