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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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Amethyst from
Empire Mine, Palmer, Richmond Township, Marquette County, Michigan, USA


03906230017362308415227.jpg
Amethyst

Empire Mine, Palmer, Richmond Township, Marquette County, Michigan, USA
00234170017362308422759.jpg
Amethyst

Empire Mine, Palmer, Richmond Township, Marquette County, Michigan, USA
06759340017272298554173.jpg
Amethyst

Empire Mine, Palmer, Richmond Township, Marquette County, Michigan, USA
00234170017362308422759.jpg
Amethyst

Empire Mine, Palmer, Richmond Township, Marquette County, Michigan, USA
00352080017272298566312.jpg
Amethyst

Empire Mine, Palmer, Richmond Township, Marquette County, Michigan, USA
06348570017362308422572.jpg
Amethyst

Empire Mine, Palmer, Richmond Township, Marquette County, Michigan, USA
Locality type:Open-Cast Mine
Classification
Species:Quartz var: Amethyst
Formula:SiO2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Goethite1
Sepiolite1
Hematite1
Asbestos1
- var Mountain Leather1
Data
Mineral Data:Click here to view Amethyst data
Locality Data:Click here to view Empire Mine, Palmer, Richmond Township, Marquette County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:64098
Long-form Identifier:1:3:64098:7
GUID (UUID V4):0
Nearest other occurrences of Amethyst
3.0km (1.8 miles) ⓘTilden Mine, Tilden Township, Marquette County, Michigan, USA
38.6km (24.0 miles) ⓘEagle Mine, Michigamme Township, Marquette County, Michigan, USA
44.2km (27.5 miles) ⓘOhio Mines (Imperial Mine; Webster Mine), Imperial Heights, Baraga County, Michigan, USA
66.2km (41.1 miles) ⓘCrystal Falls Mine, Crystal Falls Township, Iron County, Michigan, USA
74.9km (46.6 miles) ⓘGravel quarry, Norway, Dickinson County, Michigan, USA
77.6km (48.2 miles) ⓘEast Vulcan Mine, Vulcan, Dickinson County, Michigan, USA
References
Morris, Tom (1983) Michigan Mineralogy. A locality Index. Rocks & Minerals, 58 (3). 107-113 doi:10.1080/00357529.1983.11767128p.111
 
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