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Franklin Co., North Carolina, USA
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Detailed Mineral List:
Actinolite var: Smaragdite
Formula: Ca2(Mg,Fe2+)5Si8O22(OH)2
Reference: [www.johnbetts-fineminerals.com]
'Albite-Anorthite Series'
Locality: Castalia Quarry, Franklin Co., North Carolina, USA
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: www. john betts.com
'Asbestos'
Reference: Genth,F.A.,1891,The Minerals Of North Carolina;USGS Bulletion No.74
Beryl
Formula: Be3Al2(Si6O18)
Locality: Alston Mine, Franklin Co., North Carolina, USA
'Biotite'
Reference: J. Robert Butler,1984,Map showing Paleozoic Metamorphic Facies,NCGS
Localities: Recorded from at least 2 other localities in this region.
Chalcopyrite
Formula: CuFeS2
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
Corundum var: Ruby
Formula: Al2O3
Reference: [www.johnbetts-fineminerals.com]
Localities: Recorded from at least 1 other locality in this region.
Corundum var: Sapphire
Formula: Al2O3
Localities: Recorded from at least 1 other locality in this region.
Photo: Sapphire from Franklin Co., North Carolina, USA
Diamond
Formula: C
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
Gold
Formula: Au
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
'Halloysite'
Formula: Al2(Si2O5)(OH)4
Reference: Genth,F.A (1891) The Minerals Of North Carolina;USGS Bulletion No.74
Ilmenite
Formula: Fe2+TiO3
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: Genth,F.A (1891) The Minerals Of North Carolina;USGS Bulletion No.74
Localities: Recorded from at least 1 other locality in this region.
'K Feldspar'
Localities: Gully Mine, Franklin Co., North Carolina, USA
Van Alston Deposit, Franklin Co., North Carolina, USA
Kyanite
Formula: Al2(SiO4)O
Reference: J.Robert Butler,1984,Map showing Paleozoic Metamorphic Facies, NCGS
Magnetite
Formula: Fe2+Fe3+2O4
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
Microcline
Formula: KAlSi3O8
Locality: Castalia Quarry, Franklin Co., North Carolina, USA
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Localities: Van Alston Deposit, Franklin Co., North Carolina, USA
Alston Mine, Franklin Co., North Carolina, USA
Gully Mine, Franklin Co., North Carolina, USA
J. F. Mitchell Deposit, Franklin Co., North Carolina, USA
Muscovite var: Sericite
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
'Perthite'
Localities: Recorded from at least 1 other locality in this region.
Pyrite
Formula: FeS2
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
Pyrrhotite
Formula: Fe1-xS (x = 0 to 0.17)
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
Quartz
Formula: SiO2
Reference: Genth,F.A.,1891,The Minerals Of North Carolina;USGS Bulletion No.74
Localities: Recorded from at least 5 other localities in this region.
Quartz var: Amethyst
Formula: SiO2
Reference: Pratt,Joseph Hyde,1933,Gems and Gem Minerals of North Carolina: American Mineralogist,Vol.18,No.4,April,1933
Rutile
Formula: TiO2
Locality: Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
Staurolite
Formula: (Fe2+,Mg,Zn)1.5-2Al9(SiO4)4O6(OH,O)2
Reference: J.Robert Butler,1984, Map showing Paleozoic Metamorphic Facies,NCGS
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Gems and Minerals of America-Jay Ellis Ransom-1974


29 entries listed. 17 valid minerals.
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