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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Calcite from
Regal prospect (Regal group prospect), Yuma County, Arizona, USA


Locality type:Prospect
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Regal prospect (Regal group prospect), Yuma County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:516149
Long-form Identifier:1:3:516149:2
GUID (UUID V4):0
Nearest other occurrences of Calcite
1.6km (1.0 miles) ⓘIXL Mine (I.X.L. prospect; IXL prospect), Geyser lode, Ocotillo Mine Group, Yuma County, Arizona, USA
4.2km (2.6 miles) ⓘGeyser Mine (Silent King Mine), Geyser lode, Ocotillo Mine Group, Yuma County, Arizona, USA
4.6km (2.9 miles) ⓘRand prospect, Geyser lode, Ocotillo Mine Group, Yuma County, Arizona, USA
5.0km (3.1 miles) ⓘC.O.D. Mine (C.O.D. prospect; C.O.D. group of claims), Red Raven Wash, Ocotillo Mine Group, Yuma County, Arizona, USA
5.6km (3.4 miles) ⓘBig Horn prospect, Red Raven Wash, Ocotillo Mine Group, Yuma County, Arizona, USA
9.1km (5.6 miles) ⓘCemitosa prospect, La Paz County, Arizona, USA
10.0km (6.2 miles) ⓘKofa Queen Mine (Kofa Mine), Palm Canyon, Yuma County, Arizona, USA
11.9km (7.4 miles) ⓘTunnel Spring Mine (Tunnel Springs prospect; Tunnel Springs group of claims; Ramshorn prospect), Yuma County, Arizona, USA
12.2km (7.6 miles) ⓘUnnamed Fluorspar occurrence, Kofa Mining District, Yuma County, Arizona, USA
12.2km (7.6 miles) ⓘBlack Dahlia Mine, Kofa Mining District, Yuma County, Arizona, USA
References
MRDS database Dep. ID file #10027211, MRDS ID #M002487.
 
and/or  
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