John Betts - Fine Minerals's Image Gallery

Franckeite: (Pb,Sn)6Fe++Sn2Sb2S14

Comments: Massive franckeite with pockets of small .5 mm crystals.
Location: Animas Mine, Atocha-Quechisla district, Sud Chichas Province, Potosí Department, Bolivia. Scale: 25x20x15 mm.
© John Betts - Fine Minerals

Freibergite: (Ag,Cu,Fe)12(Sb,As)4S13

Comments: Dark metallic freibergite in white quartz.
Location: Freiberg, Freiberg District, Erzgebirge, Saxony, Germany. Scale: 35x20x10 mm.
© John Betts - Fine Minerals

Gadolinite-(Ce): (Ce,La,Nd,Y)2Fe++Be2Si2O10

Comments: Sharp, well crystallized single crystal of brown gadolinite.
Location: Buer, Bjørkedalen, Porsgrunn, Telemark, Norway. Scale: 18x14x8 mm.
© John Betts - Fine Minerals

Geocronite: Pb14(Sb,As)6S23

Comments: Many black geocronite crystals intergrown in milky quartz(?) matrix.
Location: Sala Silver Mine, Sala, Västmanland, Sweden. Scale: 17x17x12 mm.
© John Betts - Fine Minerals

Goosecreekite: CaAl2Si6O16·5(H2O)

Comments: Large cluster of many rosettes of white goosecreekite.
Location: Jalgaon, Maharashtra, India. Scale: 15x14x7 cm.
© John Betts - Fine Minerals

Gotzenite: (Ca,Na)3(Ti,Al)Si2O7(F,OH)2

Comments: Yellow-brown, thin crystals of götzenite in white feldspar matrix.
Location: Barkevik, Langesundsfjorden, Vestfold, Norway. Scale: 3.5x3x3 cm.
© John Betts - Fine Minerals

Hannebachite: 2CaSO3·(H2O)

Comments: Small .5 mm crystals of colorless hannebachite on matrix.
Location: Hannebach, Niederzissen, Eifel Mts, Rhineland-Palatinate, Germany. Scale: 35x35x24 mm.
© John Betts - Fine Minerals

Heulandite-Ca: (Ca,Na)2-3Al3(Al,Si)2Si13O36·12(H2O)  
Mordenite: (Ca,Na2,K2)Al2Si10O24·7(H2O)

Comments: Pink heulandite crystals up to 15 mm in fibrous white mordenite matrix.
Location: Rats Nest Claim, Challis, Custer Co., Idaho, USA. Scale: 6x6x4 cm.
© John Betts - Fine Minerals

Hydroxylwagnerite: Mg2(PO4)(OH)

Comments: Small cavity in white quartzite with several tan-colored hydroxylwagnerite crystals with red arrow pointing to the cavity.
Location: Dora Maira Massif, Val Varaita, Piedmont, Italy. Scale: Picture size 3 mm.
© John Betts - Fine Minerals

Hydrozincite: Zn5(CO3)2(OH)6

Comments: Well crystallized, colorless hydrozincite crystals encrusting a limonitic gossan matrix. Fluoresces bright blue-white under UV illumination.
Location: Ojuela mine, Mapimí, Mun. de Mapimí, Durango, Mexico. Scale: 3x3x2 cm.
© John Betts - Fine Minerals

Iddingsite: MgO.Fe2O3.3SiO2·4(H2O)

Comments: Red iddingsite with green olivine. Iddingsite alteration of olivine commonly seen in thin-sections is actually a fine-grained mixture of goethite+quartz+chlorite.
Location: Amboy, San Bernadino County, California, USA. Scale: Specimen Size 5x5x3 cm.
© John Betts - Fine Minerals

Ishikawaite: (U,Fe,Y,Ca)(Nb,Ta)O4 (?)

Comments: Blocky, metamict crystals of ishikawaite.
Location: Spinelli Quarry (Spinelli prospect), South Glastonbury, Hartford Co., Connecticut, USA. Scale: 15x15x10 mm.
© John Betts - Fine Minerals

Joseite: Bi4(S,Te)3

Comments: Milky quartz matrix with a 15 mm long group of metallic joseite crystals.
Location: Caldbeck Fells, Cumbria, England, UK. Scale: 5x3.5x2.5 cm.
© John Betts - Fine Minerals

Lepidocrocite: FeO(OH)

Comments: Translucent, red-brown crystals of lepidocrocite lining cavities in gossan matrix.
Location: Eisenzecher Zug Mine, Eiserfeld, Siegen District, North Rhine-Westphalia, Germany. Scale: 7x5x3 cm.
© John Betts - Fine Minerals

Leucite: KAlSi2O6

Comments: Large single crystal of dark gray leucite.
Location: Roccamonfina, Caserta Province, Campania, Italy. Scale: 20x20x20 mm.
© John Betts - Fine Minerals

Levyne-Ca: (Ca,Na2,K2)Al2Si4O12·6(H2O)

Comments: Vesicle in basalt matrix lined with white levyne crystals.
Location: Beech Creek Quarry, Mount Vernon, Grant Co., Oregon, USA. Scale: 32x22x20 mm.
© John Betts - Fine Minerals

Magnesio-arfvedsonite: NaNa2(Mg4Fe++)Si8O22(OH)2  
Vitusite-(Ce): Na3(Ce,La,Nd)(PO4)2

Comments: Translucent beige-colored vitusite-(Ce) in a rim around a black magnesio-arfvedsonite crystal.
Location: Yubileinaya Vein, Karnasurt Mountain, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Russia. Scale: Specimen Size 4x3x3 cm.
© John Betts - Fine Minerals

Massicot: PbO

Comments: Small nugget of reddish-yellow massicot.
Location: Wytheville, Wythe Co., Virginia, USA. Scale: 18x10x5 mm.
© John Betts - Fine Minerals

Microlite: (Na,Ca)2Ta2O6(O,OH,F)

Comments: Brown crystal of microlite 10 mm in an albite matrix.
Location: Morefield Mine, Winterham, Amelia Co., Virginia, USA. Scale: 5x4x3 cm.
© John Betts - Fine Minerals

Minium: Pb++2Pb++++O4

Comments: Bright orange minium with curved, conchoidal surfaces.
Location: Santa Fé Mine, Bolaños, Mun. de Bolaños, Jalisco, Mexico. Scale: 33x22x14 mm.
© John Betts - Fine Minerals