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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Sericite from
Kirk Mine, Quartz Hill, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA


Locality type:Mine
Classification
Species:Muscovite var: Sericite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sericite data
Locality Data:Click here to view Kirk Mine, Quartz Hill, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:666016
Long-form Identifier:1:3:666016:1
GUID (UUID V4):0
Nearest other occurrences of Sericite
4.7km (2.9 miles) ⓘStanley Mine (Gehrmann; Cooper; York; Whale; Golden Link), Idaho Springs Mining District (Virginia Mining District), Clear Creek County, Colorado, USA
5.9km (3.7 miles) ⓘJewelry Shop Mine (West Gold Mine; Sylvanite Mine), Lamartine Mining District, Clear Creek County, Colorado, USA
7.1km (4.4 miles) ⓘGerman and Belcher, Quartz Hill, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
8.6km (5.3 miles) ⓘInvincible (Baltimore; Brighton; Silver Link; Blackwood; Alpine; Roca; Brownell; Frelland; Lance; Mint; Mammoth; Belle Creole; Ariadne; Diamond Mt.; Miller; Cecil; Falcon; Harrisburg; C. M. Welch), Lamartine Mining District, Clear Creek County, Colorado, USA
9.0km (5.6 miles) ⓘAjax Mica Mine (Floyd Hill Mica Mine), Clear Creek Pegmatite Province, Clear Creek County, Colorado, USA
9.3km (5.8 miles) ⓘAmerican Sisters Mine, Lawson Mining District, Clear Creek County, Colorado, USA
12.5km (7.8 miles) ⓘSilver Mountain Occurrence, Silver Mountain Ore Zone, Upper Union Mining District, Clear Creek County, Colorado, USA
12.6km (7.8 miles) ⓘGold Fissure Mine, Silver Mountain Ore Zone, Upper Union Mining District, Clear Creek County, Colorado, USA
12.6km (7.9 miles) ⓘGold Dirt Mine, Silver Mountain Ore Zone, Upper Union Mining District, Clear Creek County, Colorado, USA
18.6km (11.6 miles) ⓘEnterprise Vein Occurrence, Eldora, Caribou Mining District, Boulder County, Colorado, USA
References
Sims, P.K. (1963) Geology of uranium and associated ore deposits, central part of the Front Range mineral belt, Colorado. Professional Paper 371. US Geological Survey doi:10.3133/pp371
 
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