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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Quartz from
Big Rock Quarry (3M Quarry; Arch Street Pike Quarry), Granite Mountain area, Little Rock, Pulaski County, Arkansas, USA


04190700017361192385438.jpg
Chalcedony, etc.

Big Rock Quarry, Granite Mountain area, Little Rock, Pulaski County, Arkansas, USA
04190700017361192385438.jpg
Chalcedony, etc.

Big Rock Quarry, Granite Mountain area, Little Rock, Pulaski County, Arkansas, USA
04190700017361192385438.jpg
Chalcedony, etc.

Big Rock Quarry, Granite Mountain area, Little Rock, Pulaski County, Arkansas, USA
Locality type:Quarry
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Natrolite2
Fluorite2
Chlorite Group2
Albite2
Pyrophanite2
Zircon1
Kupletskite1
Eggletonite1
Aegirine1
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Big Rock Quarry (3M Quarry; Arch Street Pike Quarry), Granite Mountain area, Little Rock, Pulaski County, Arkansas, USA
Data Identifiers
Mindat Occurrence Record ID:49437
Long-form Identifier:1:3:49437:9
GUID (UUID V4):0
Nearest other occurrences of Quartz
10.2km (6.3 miles) ⓘBig Rock Quarry (Big Rock Sandstone Quarry), North Little Rock, Pulaski County, Arkansas, USA
15.0km (9.3 miles) ⓘJeffrey Quarry, Jeffrey, Pulaski County, Arkansas, USA
19.9km (12.4 miles) ⓘKellogg Mine (Confederate Mine; German shaft; Welldiggen claim), North Little Rock, Pulaski County, Arkansas, USA
21.8km (13.5 miles) ⓘQuapaw Bauxite Mine, Arkansas Bauxite District, Saline County, Arkansas, USA
22.4km (13.9 miles) ⓘRector Hill Quarry, Maumelle, Pulaski County, Arkansas, USA
25.7km (16.0 miles) ⓘArkansas Talc Co. Mine (Warner Mine; Duke Warner Mine), Salem, Saline County, Arkansas, USA
26.2km (16.3 miles) ⓘInman Mine (Inman Soapstone prospect), Salem, Saline County, Arkansas, USA
28.5km (17.7 miles) ⓘWallis Mine (Wallis Soapstone pit), Salem, Saline County, Arkansas, USA
37.7km (23.4 miles) ⓘStand-on-Your-Head No. 1 mine (Alum Creek prospect), Bland, Saline County, Arkansas, USA
40.2km (25.0 miles) ⓘUnnamed Ruthenium locality, Saline County, Arkansas, USA
References
Rocks & Min.:63:120.
 
and/or  
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