Rruff Database's Image Gallery

Clinoptilolite-Ca: (Ca,Na,K)2-3Al3(Al,Si)2Si13O36·12(H2O)

Comments: Druse of colorless, clear tabular somewhat pseudohexagonal crystals of clinoptiloite-Ca in vug.
Location: Fish Creek Quarry, Clackamas River, Estacada, Clackamas County, Oregon, USA. Scale: See Image.
© Rruff Database

Danalite: Fe++4Be3(SiO4)3S

Comments: Orange irregular gemmy danalite in matrix.
Location: Iron Mountain, Winston, New Mexico, USA. Scale: See Image.
© Rruff Database

Deerite: (Fe++,Mn)6(Fe+++,Al)3Si6O20(OH)5

Comments: Black bladed deerite crystals embedded in quartz and fibrous riebeckite.
Location: Laytonville quarry, Laytonville, Mendocino County, California, USA. Scale: See Image.
© Rruff Database

Dienerite: Ni3As  
Nickelskutterudite: (Ni,Co)As3-x

Comments: Aggregate of silver-gray nickelskutterudite cubes, some tarnished to a brassy color. Dienerite is now considered to be nickelskutterudite.
Location: Hasserode, Harz, Germany. Scale: See Image.
© Rruff Database

Duftite-beta: PbCu(AsO4)(OH)  
Jamesite: Pb2Zn2Fe+++5(AsO4)5O4

Comments: Reddish-brown bladed jamesite crystals overgrown with white dolomite and associated with dark green duftite.
Location: Tsumeb mine, Tsumeb, Otavi District, Oshikoto, Namibia. Scale: See Image.
© Rruff Database

Durangite: NaAl(AsO4)F

Comments: Equant red crystals of durangite with a dusting of white powder.
Location: Northern end Thomas Range, Juab County, Utah, USA. Scale: See Image.
© Rruff Database

Dussertite: BaFe+++3(AsO4)2(OH)5

Comments: Light green hexagonal plates of dussertite lining vug associated with quartz and pharmacosiderite.
Location: Clara mine, Rankach Valley, Oberwolfach, Wolfach, Black Forest, Baden-Wurttemberg, Germany. Scale: See Image.
© Rruff Database

Erionite-Ca: (Ca,K2,Na2)2[Al4Si14O36]·15(H2O)

Comments: Radiating group of colorless acicular hexagonal prisms of erionite-Ca.
Location: Moeraki, Otago, South Island, New Zealand. Scale: See Image.
© Rruff Database

Erionite-K: (K2,Ca,Na2)2[Al4Si14O36]·15(H2O)

Comments: Randomly oriented colorless prismatic erionite-K crystals in a vug.
Location: Chase Creek, Falkland, British Columbia, Canada. Scale: See Image.
© Rruff Database

Faizievite: K2Na(Ca6Na)Ti4Li6Si24O66F2

Comments: Pale brownish yellow massive faizievite associated with quartz.
Location: Dara-i-Pioz Glacier, Alayskiy (Alai) Range, Tien Shan Mts, Districts of the Republican Subordination, Tajikistan. Scale: See Image.
© Rruff Database

Faujasite-Ca: (Ca,Na2,Mg)3.5[Al7Si17O48]·32(H2O)

Comments: Isolated colorless octahedra faujasite-Ca in basalt vesicules.
Location: Table Mountain, San Bernardino County, California, USA. Scale: See Image.
© Rruff Database

Faujasite-Mg: (Mg,Na2,Ca)3.5[Al7Si17O48]·32(H2O)

Comments: Colorless octahedra of faujasite-Mg in basalt vesicles.
Location: Limburg Quarries, Sasbach, Kaiserstuhl, Baden-Wurttemberg, Germany. Scale: See Image.
© Rruff Database

Fergusonite-beta-(Ce): (Ce,La,Nd)NbO4

Comments: Dark brown vitreous amorphous (metamict) fragments of fergusonite-beta-(Ce).
Location: Amherst County, Virginia, USA. Scale: See Image.
© Rruff Database

Ferripedrizite: NaLi2(Fe+++2Mg2Li)Si8O22(OH)2

Comments: Black, bladed ferripedrizite crystals.
Location: East Pedriza Massif, Sierra de Guadarrama, Spain. 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

Ferroselite: FeSe2

Comments: Yellowish silver metallic prismatic ferroselite crystals on matrix.
Location: Virgin No. 3 mine, Paradox Valley, Uravan District, Montrose County, Colorado, USA. Scale: See Image.
© Rruff Database

Feruvite: (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4

Comments: Dark green grains of feruvite in matrix.
Location: Red Cross Lake, Manitoba, Canada. Scale: See Image.
© Rruff Database

Filatovite: K[(Al,Zn)2(As,Si)2O8]

Comments: Colorless prismatic single crystal embedded in epoxy, co-type material.
Location: Great Tolbachik Eruption (1976), Tolbachik Volcano, Kamchatka Peninsula, Russia. Scale: See Image.
© Rruff Database

Fingerite: Cu11(VO4)6O2

Comments: Black submetallic well-formed prismatic crystals on matrix with black, poorly-formed ziesite.
Location: Izalco Volcano, Sonsonate Department, El Salvador. Scale: See Image.
© Rruff Database

Florencite-(Nd): (Nd,Ce)Al3(PO4)2(OH)6

Comments: Brown earthy pulverulent aggregate of florencite-(Nd) forming a thin coating on matrix.
Location: Sausalito Road Quarry, Sausalito, Marin County, California, USA. Scale: See Image.
© Rruff Database