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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Schorl from
Martin Marietta Quarry (Hickory Quarry), Hickory, Catawba County, North Carolina, USA


05557400017272734397150.jpg
Schorl, etc.

Martin Marietta Quarry, Hickory, Catawba County, North Carolina, USA
05557400017272734397150.jpg
Schorl, etc.

Martin Marietta Quarry, Hickory, Catawba County, North Carolina, USA
05557400017272734397150.jpg
Schorl, etc.

Martin Marietta Quarry, Hickory, Catawba County, North Carolina, USA
Locality type:Quarry
Classification
Species:Schorl
Formula:NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Comments:Prismatic crystals to 6cm in ankerite veins. Also, radiating sprays to 15cm of slender needles have been found in sugary chlorite in ankerite veins.
Habit:Trigonal prisms with pyramidal termination.
Colour:Black
Luminescent properties:none
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Confirmation Details:Where Tested and Reference ID: K. Wood
Associated Minerals Based on Photo Data:
Plagioclase1
Data
Mineral Data:Click here to view Schorl data
Locality Data:Click here to view Martin Marietta Quarry (Hickory Quarry), Hickory, Catawba County, North Carolina, USA
Data Identifiers
Mindat Occurrence Record ID:39908
Long-form Identifier:1:3:39908:3
GUID (UUID V4):0
Nearest other occurrences of Schorl
22.6km (14.0 miles) ⓘDagenhart Mine, Alexander County, North Carolina, USA
26.9km (16.7 miles) ⓘBuffalo Vein Mine, Hiddenite, Alexander County, North Carolina, USA
28.1km (17.4 miles) ⓘHiddenite, Alexander County, North Carolina, USA
28.4km (17.6 miles) ⓘEllis Mine, Hiddenite, Alexander County, North Carolina, USA
30.1km (18.7 miles) ⓘNorth American Emerald Mine, Hiddenite, Alexander County, North Carolina, USA
32.3km (20.1 miles) ⓘMorganton Quarry (Vulcan Materials Co. Quarry), Morganton, Burke County, North Carolina, USA
42.2km (26.2 miles) ⓘLCA Mine, Gaston County, North Carolina, USA
46.3km (28.8 miles) ⓘJ.C. Mills Mine (Mill's Mine; Mills's Mine), Brindletown, Burke County, North Carolina, USA
56.5km (35.1 miles) ⓘFoote Lithium Co. Mine, Kings Mountain, Cleveland County, North Carolina, USA
73.5km (45.7 miles) ⓘMcHone Mine pegmatite, Mitchell County, North Carolina, USA
References
K. Wood collection
 
and/or  
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