Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load. These mineral photos are copyrighted by their owners and may not be used without permission.
Manganbabingtonite: Ca2(Mn,Fe++)Fe+++Si5O14(OH)
Comments: Brownish black manganbabingtonite associated with pink Inesite blades. Location: Hubei, China. Scale: 8 x 5.7 cm. © Fabre Minerals
Manganilvaite: CaFe++Fe+++(Mn,Fe++)(Si2O7)O(OH)
Comments: Small, black, very bright crystals of manganilvaite on a matrix of clear quartz, white calcite, and tiny brassy pyrite crystals. Location: Daye mining area, Hubei, China. Scale: 6 x 5.6 x 3.7 cm. © Fabre Minerals
Marcasite: FeS2
Comments: Metallic, brassy-colored marcasite with minor translucent quartz and white dolomite. Location: Panasqueira (3rd level), in the region of Beira Baixa, Portugal. Scale: 8 x 5.5 cm. © Fabre Minerals
Neptunite: KNa2Li(Fe++,Mn)2Ti2Si8O24 Natrolite: Na2[Al2Si3O10]·2(H2O)
Comments: Jet-black square prisms of neptunite etched out of the enclosing white natrolite with minor benitoite. Location: Benitoite Gem Mine. San Benito Co. California, USA. Scale: 6.5 x 6 cm. © Fabre Minerals
Norbergite: Mg3(SiO4)(F,OH)2
Comments: Yellow orange norbergite inclustions in white marble (calcite).. Location: Oakssaung Hill, Mogok, Mandalay Myanmar. Scale: Crystal size 5 mm. © Fabre Minerals
Olmiite: CaMn[SiO3(OH)](OH)
Comments: Spherical aggregate of prismatic crystals of pinkish tan olmiite.. Location: N'chwaning II Mine, section 5 south stope, 46-47 roof, Kuruman South Africa. Scale: Specimen size 2.5 × 2 × 1.4 cm. © Fabre Minerals
Orpiment: As2S3
Comments: Deep orange-colored orpiment crystal aggregate. Location: Twin Creeks mine, 62 bench, north of Winnemucca, Humboldt County, Nevada. USA. Scale: 6.5 x 5.5 cm. © Fabre Minerals
Orthoclase: KAlSi3O8
Comments: Carlsbad twinned crystal of orthoclase. Former Martín Oliete Fontela collection. Location: Zarzalejo, Madrid. Scale: 5.2x4.6x2.2 cm. © Fabre Minerals
Comments: Gemmy, twinned adularia (orthoclase) specimen on matrix. Former Bally Museum collection. Location: Rhonegletscher, Switzerland. Scale: Crystal size 3 x 2 cm. © Fabre Minerals
Perovskite: CaTiO3 Clinochlore: (Mg,Fe++)5Al(Si3Al)O10(OH)8
Comments: Square, opaque perovskite on green clinochlore. Very brilliant and with large crystals (2 x 1.5 cm.). Location: Ilmen Mountains. Chelyabinsk, Urals, Russia. Scale: 6 x 4.5 cm. © Fabre Minerals