Mineral Specimen Images (F)

Ferrisurite: (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Fe,Al)2Si4O10(OH)2]·n(H2O)

Comments: Olive-green crystalline ferrisurite, with radiating structure.
Location: Shirley Ann Claim, near Darwin, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrisurite: (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Fe,Al)2Si4O10(OH)2]·n(H2O)

Comments: Olive-green crystalline ferrisurite, with radiating structure.
Location: Shirley Ann Claim, near Darwin, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferritaramite: Na(CaNa)(Fe++,Mg)3Fe+++2[Si6Al2O22](OH)2  
Potassic-ferritaramite:

Comments: Lightly to moderately etched, blocky, jet black ferritaramite (potassic-ferritaramite is a not approved mineral name).
Location: Niaslo, Basha Valley, Baltistan, Pakistan. Scale: 5 x 1.5 x 0.3 cm.
© John Veevaert

Ferritaramite: Na(CaNa)(Fe++,Mg)3Fe+++2[Si6Al2O22](OH)2  
Potassic-ferritaramite:

Comments: Lightly to moderately etched, blocky, jet black ferritaramite (potassic-ferritaramite is a not approved mineral name).
Location: Niaslo, Basha Valley, Baltistan, Pakistan. Scale: 5 x 1.5 x 0.3 cm.
© John Veevaert

Ferritschermakite: Ca2(Fe++,Mg)3Al2(Si7Al)O22(OH)2

Comments: Dark amphibolite composed of aggregates of ferritschermakite crystals.
Location: Elisenvaara S-W Karelia, Russia. Scale: Specimen size: 12x10x6 mm.
© Sergey Vasiliev / Systematic Mineralogy

Ferritschermakite: Ca2(Fe++,Mg)3Al2(Si7Al)O22(OH)2

Comments: Dark amphibolite composed of aggregates of ferritschermakite crystals.
Location: Elisenvaara S-W Karelia, Russia. Scale: Specimen size: 12x10x6 mm.
© Sergey Vasiliev / Systematic Mineralogy

Ferritungstite: (K,Ca,Na)(W++++++,Fe+++)2(O,OH)6·(H2O)

Comments: Small, yellow crystals of ferritungstite on matrix.
Location: Clara Mine, Oberwolfach, Wolfach Valley, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Ferritungstite: (K,Ca,Na)(W++++++,Fe+++)2(O,OH)6·(H2O)

Comments: Small, yellow crystals of ferritungstite on matrix.
Location: Clara Mine, Oberwolfach, Wolfach Valley, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Ferriwinchite: ([ ],Na)(Na,Ca)2(Mg, Fe++)4Fe+++[Si8O22](OH)2

Comments: Deep black-blue bladed single ferriwinchite crystals embedded in white dolomite.
Location: Imerina, Madagascar. Scale: See Image.
© Rruff Database

Ferriwinchite: ([ ],Na)(Na,Ca)2(Mg, Fe++)4Fe+++[Si8O22](OH)2

Comments: Deep black-blue bladed single ferriwinchite crystals embedded in white dolomite.
Location: Imerina, Madagascar. Scale: See Image.
© Rruff Database

Ferro-actinolite: [ ]Ca2Fe++5Si8O22(OH)2

Comments: Prismatic crystals of ferro-actinolite showing terminal crystal faces..
Location: Astor, Shigar Valley Pakistan. Scale: 4.5 x 3.3 x 4.2 cm.
© Fabre Minerals

Ferro-actinolite: [ ]Ca2Fe++5Si8O22(OH)2

Comments: Prismatic crystals of ferro-actinolite showing terminal crystal faces..
Location: Astor, Shigar Valley Pakistan. Scale: 4.5 x 3.3 x 4.2 cm.
© Fabre Minerals

Ferroalluaudite: NaCaFe++(Fe++,Mn,Fe+++,Mg)2(PO4)3

Comments: Dark green crystalline ferro alluaudite in pegmatite.
Location: Chandler Mills Mine, Newport, Sullivan County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferroalluaudite: NaCaFe++(Fe++,Mn,Fe+++,Mg)2(PO4)3

Comments: Dark green crystalline ferro alluaudite in pegmatite.
Location: Chandler Mills Mine, Newport, Sullivan County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferro-aluminotschermakite: Ca2Fe++3Al2(Si7Al)O22(OH)2

Comments: Minute dark green translucent crystals of ferro-aluminotschermakite(?).
Location: Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek, Windhoek District, Khomas Region, Namibia. Scale: Picture Size 0.4 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferro-aluminotschermakite: Ca2Fe++3Al2(Si7Al)O22(OH)2

Comments: Minute dark green translucent crystals of ferro-aluminotschermakite(?).
Location: Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek, Windhoek District, Khomas Region, Namibia. Scale: Picture Size 0.4 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferro-anthophyllite: [ ]Fe++7Si8O22(OH)2

Comments: TEM image showing a small percentage of Pnma ferroanthophyllite of similar composition is present as thin slabs intergrown parallel to (100) of grunerite and as individual µ-size crystals.
Location: Rockport grunerite, Massachusetts, USA. (AmMin, v86:1252). Scale: See Image.
© American Mineralogist

Ferro-anthophyllite: [ ]Fe++7Si8O22(OH)2

Comments: TEM image showing a small percentage of Pnma ferroanthophyllite of similar composition is present as thin slabs intergrown parallel to (100) of grunerite and as individual µ-size crystals.
Location: Rockport grunerite, Massachusetts, USA. (AmMin, v86:1252). Scale: See Image.
© American Mineralogist

Ferrobustamite: Ca(Fe++,Ca,Mn)Si2O6

Comments: Grayish crystalline ferrobustamite with white calcite, golden colored phlogopite and green actinolite.
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrobustamite: Ca(Fe++,Ca,Mn)Si2O6

Comments: Grayish crystalline ferrobustamite with white calcite, golden colored phlogopite and green actinolite.
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species