Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Gypsum from
School Section 32; 22-22, Thompsons Mining District, Grand County, Utah, USA


Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view School Section 32; 22-22, Thompsons Mining District, Grand County, Utah, USA
Data Identifiers
Mindat Occurrence Record ID:1678883
Long-form Identifier:1:3:1678883:5
GUID (UUID V4):0
Nearest other occurrences of Gypsum
1.9km (1.2 miles) ⓘLittle Eva Mine, Yellow Cat Mesa, Thompsons Mining District, Grand County, Utah, USA
2.3km (1.4 miles) ⓘParco Mines, Yellow Cat Mesa, Thompsons Mining District, Grand County, Utah, USA
2.7km (1.7 miles) ⓘParco No. 23 Mine, Parco Mines, Yellow Cat Mesa, Thompsons Mining District, Grand County, Utah, USA
3.6km (2.2 miles) ⓘParco No. 24, Parco Mines, Yellow Cat Mesa, Thompsons Mining District, Grand County, Utah, USA
5.9km (3.7 miles) ⓘSilver Moon Deposit, Thompsons Mining District, Grand County, Utah, USA
7.4km (4.6 miles) ⓘMolly Hogan group, Parco Mines, Yellow Cat Mesa, Thompsons Mining District, Grand County, Utah, USA
12.7km (7.9 miles) ⓘSquaw Park Group Nos. 1-7, Thompsons Mining District, Grand County, Utah, USA
22.5km (14.0 miles) ⓘSalt Valley Claims, Thompsons Mining District, Grand County, Utah, USA
22.9km (14.2 miles) ⓘShinarump Nos. 1 - 3 Mines, Seven Mile Canyon Mining District, Grand County, Utah, USA
26.9km (16.7 miles) ⓘUnknown Cu-U-V Occurrence (MRDS - 10078967), Seven Mile Canyon Mining District, Grand County, Utah, USA
References
Kampf, Anthony R.; Olds, Travis A.; Ma, Chi; Marty, Joe (2025) Yellowcatite, KNaFe3+2(Se4+O3)2(V5+2O7) 7H2O, the first selenite-vanadate. Mineralogical Magazine, 89 (3). 421-427 doi:10.1180/mgm.2024.107
 
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