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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Chalcedony from
Aztec Mine, Summitville Mine, Summitville, Rio Grande County, Colorado, USA


Locality type:Mine
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Aztec Mine, Summitville Mine, Summitville, Rio Grande County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:305146
Long-form Identifier:1:3:305146:7
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
8.9km (5.5 miles) ⓘVera Breccia Pipe Occurrence, Platoro Mining District (Ute Mining District), Conejos County, Colorado, USA
8.9km (5.5 miles) ⓘValley Queen Mine (Platoro Tunnel; Ajax Nos. 1-10; Texas; Snowstorm; Platoro Tunnel Site; Valley King; Valley Queen Group; Patented Claims: Valley Queen; Shasta), Platoro Mining District (Ute Mining District), Conejos County, Colorado, USA
9.4km (5.9 miles) ⓘParole Mine (Parole Group; Patented Claims: Parole; MS 6606; Parole No. 2; MS 6606), Platoro Mining District (Ute Mining District), Conejos County, Colorado, USA
9.8km (6.1 miles) ⓘMammoth Revenue Mine (Mammoth Mine), Platoro Mining District (Ute Mining District), Conejos County, Colorado, USA
16.0km (9.9 miles) ⓘDee Stock Occurrence, Platoro Mining District (Ute Mining District), Conejos County, Colorado, USA
25.3km (15.7 miles) ⓘTreasure Falls locality, Wolf Creek Pass, Mineral County, Colorado, USA
38.5km (23.9 miles) ⓘBlue Sky mine, Conejos County, Colorado, USA
40.1km (24.9 miles) ⓘDel Norte Thunder Egg beds, Saguache County, Colorado, USA
41.6km (25.8 miles) ⓘColorado Fluorspar Company Mine, Wagon Wheel Gap, Mineral County, Colorado, USA
49.4km (30.7 miles) ⓘTrout Creek Sulfur Deposit, Mineral County, Colorado, USA
References
Holmes, Richard Walker, Kennedy, Marrianna B. (1983) Mines and Minerals of the Great American Rift (Colorado-New Mexico). Van Nostrand Reinhold Co., New York.
 
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