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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Illite from
Sacramento Hill, Bisbee, Cochise County, Arizona, USA


Locality type:Hill
Classification
Species:Muscovite var: Illite
Formula:K0.65Al2.0[Al0.65Si3.35O10](OH)2
Comments:Occurs in hydrothermally altered granite porphyry stock as an alteration of feldspar; in dikes that cut limestones peripheral to the stock.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Illite data
Locality Data:Click here to view Sacramento Hill, Bisbee, Cochise County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:249494
Long-form Identifier:1:3:249494:4
GUID (UUID V4):0
Nearest other occurrences of Illite
32.7km (20.3 miles) ⓘGallagher Vanadium & Rare Minerals Corp Mine, Tombstone Mining District, Cochise County, Arizona, USA
47.3km (29.4 miles) ⓘFesterling Mine (Elsicor Mine; Cora Mine), Black Diamond Peak, Middle Pass Mining District, Cochise County, Arizona, USA
61.5km (38.2 miles) ⓘKartchner Caverns, Cochise County, Arizona, USA
77.3km (48.1 miles) ⓘRed Mountain Mine (Red Mountain Copper prospect; Gem Mine; Carlton property; Ten Grand Mine; Red Mountain project), Red Mountain, Patagonia Mountains, Santa Cruz County, Arizona, USA
79.6km (49.5 miles) ⓘSunnyside & Volcano Mines (Sunnyside Mine group; Volcano-Sunnyside Mine; Sunnyside Mine), Alum Gulch, Harshaw Mining District, Patagonia Mountains, Santa Cruz County, Arizona, USA
80.1km (49.8 miles) ⓘWillcox Playa, Willcox, Cochise County, Arizona, USA
90.6km (56.3 miles) ⓘCross Hill Quarry (Pantano Clay deposit; Mineral Lease No. 23880C), Pantano Wash, Rincon Valley, Pima County, Arizona, USA
95.7km (59.4 miles) ⓘPicacho, Bacoachi, Bacoachi Municipality, Sonora, Mexico
References
Schwartz, George Melvin (1947) Hydrothermal alteration in the "porphyry copper" deposits. Economic Geology, 42 (4) 319-352 doi:10.2113/gsecongeo.42.4.319
Anthony, John W.; Williams, Sidney A.; Bideaux, Richard A.; Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.p.257
 
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