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Foggite: CaAl(PO4)(OH)2·(H2O)
Comments: Bright yellow, rounded crystalline aggregates of foggite on matrix. Location: Palermo #1 mine, North Groton, Crafton County, New Hampshire, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Fornacite: Pb2Cu(CrO4)(AsO4)(OH)
Comments: Dark, prismatic crystals of fornacite on matrix. Location: El Khun mine, Anarak, Iran. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Fourmarierite: Pb(UO2)4O3(OH)4·4(H2O)
Comments: Thick tabular orange crystals of fourmarierite. Location: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Fransoletite: H2Ca3Be2(PO4)4·4(H2O)
Comments: Light blue crystals of fransoletite. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Friedelite: Mn8Si6O15(OH,Cl)10
Comments: Rose red crystals of friedelite on matrix. Location: Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Frondelite: Mn++Fe+++4(PO4)3(OH)5 Kidwellite: Na(Fe+++,Cu)9+x(PO4)6(OH)11·3(H2O)
Comments: Root beer colored crystals of frondelite and white kidwellite sticks on matrix. Location: Sapucaia, Minas Gerais, Brazil. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Genthelvite: Zn4Be3(SiO4)3S
Comments: Pyramidal crystals of genthelvite. Location: Mont St. Hilaire, Quebec, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Georgiadesite: Pb4(AsO3)Cl4(OH)
Comments: Light blue, pseudo-cubic crystal of georgiadesite. Location: Laurium, Greece. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Gilalite: Cu5Si6O17·7(H2O)
Comments: Striated, prismatic pale greenish yellow crystal of gilalite. Location: Christmas mine, Hayden, Gila County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Gismondine: Ca2Al4Si4O16·9(H2O)
Comments: Clear crystal of gismondine on matrix. Location: Alban Hills, near Rome, Latium, Italy. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals