Diederik Visser's Image Gallery

Aksaite: MgB6O7(OH)6·2(H2O)

Comments: Gray-white massive aksaite fragment photographed through a capsule.
Location: Chelkar Salt dome, Ak-Say Valley, Kazakhstan. Scale: Not Given.
© Diederik Visser

Alarsite: AlAsO4

Comments: Small thread-like alarsite fragment held to sample peg by a drop of glue.
Location: Tolbachik Volcano, Main Fracture, North Breakthrough, Kamchatka Peninsula, Russia. Scale: Peg Size 2 mm.
© Diederik Visser

Aleksite: PbBi2Te2S2 (?)

Comments: Gray, metallic aleskite grains in quartz with tellurobismuthite and Pb-bearing tetradymite.
Location: St. David's Mine, Bontddu, Dogellau, Gwynedd, Wales, UK. Scale: Specimen Size 2.5x4.5 cm.
© Diederik Visser

Allanpringite: Fe3(PO4)2(OH)3·5H2O

Comments: Yellow crystals of allanpringite with cacoxenite and beraunite.
Location: Grube Mark, Essershausen, Weilburg, Taunus, Gerrmany. Scale: Picture size 1 cm.
© Diederik Visser

Alum-(K): KAl(SO4)2·12(H2O)

Comments: White encrustations and ballshaped aggregates of potassium alum.
Location: Scholler mine, Libusin, Kladno, Czech Republic. Scale: See Fingers for Scale.
© Diederik Visser

Ancylite-(La): Sr(La,Ce)(CO3)2(OH)·(H2O)

Comments: Pale brown aggregates of ancylite-(La) crystals with some aegirine on matrix.
Location: Mt. Kukisvumchorr, Chibiny, Kola, Russia. Scale: Specimen Size 2.5x3.5 cm.
© Diederik Visser

Antarcticite: CaCl2·6(H2O)

Comments: White antarcticite crystals in sealed in mineral oil.
Location: Bristol Lake, Mojave Co.,California, USA. Scale: Sample Jar 6 cm.
© Diederik Visser

Arsenoflorencite-(La): (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6

Comments: BSE image of four grains of orange-red Arsenoflorencite-(La) from heavy concentrates of gold-bearing sedimentary rocks.
Location: Grubependity Lake, Maldinskii Region, Prepolar Ural, Russia. Scale: See Image.
© Diederik Visser

Arsenuranospathite: HAl(UO2)4(AsO4)4·40(H2O)

Comments: Yellowgreen to brown arsenuranospathite crust on matrix.
Location: Elias Mine, Jachymov, Bohemia, Czech Republic. Scale: Specimen Size 2.1x2.7 cm.
© Diederik Visser

Avdoninite: K2Cu5Cl8(OH)4·H2O

Comments: Aggregates of green avdoninite crystals.
Location: Blyava Cu Mine, Southern Urals, Russia. Scale: Specimen size 1.5 x 2 cm.
© Diederik Visser

Banalsite: BaNa2Al4Si4O16

Comments: Massive brown to flesh colored banalsite in matrix.
Location: Benallt Mine, Lleyn Peninsula, Wales, UK. Scale: Specimen Size 5x6 cm.
© Diederik Visser

Belkovite: Ba3(Nb,Ti)6(Si2O7)2O12

Comments: Brown hypidiomorphic granular grains of belkovite in tonalite.
Location: Seblyavr Massif, Kola, Russia. Scale: Not Give - 2 cm?.
© Diederik Visser

Benleonardite: Ag8(Sb,As)Te2S3

Comments: Gray-black benleonardite on hessite.
Location: Moctezuma, Sonora, Mexico. Scale: Specimen Size 2x3 cm.
© Diederik Visser

Berezanskite: KLi3Ti2Si12O30

Comments: Granular white berezanskite in quartz.
Location: Dara-i-Pioz Glacier, Altai Range, Tadzhikistan. Scale: Specimen Size 1.5x2.5 cm.
© Diederik Visser

Billingsleyite: Ag7AsS6

Comments: Gray-black billingsleyite crystals on matrix with famatinite, arsenopyrite.
Location: Grube Clara, Oberwolfach, Schwarzwald, Germany. Scale: Picture size 1.0 x 0.6 cm.
© Diederik Visser

Biraite-(Ce): Ce2Fe++(CO3)(Si2O7)

Comments: Brown grains of biraite-(Ce) in matrix.
Location: Biraya Fe-REE Ore occurrence, Vitim Highland, Buratie Republic, Eastern Siberia, Russia. Scale: Not Given.
© Diederik Visser

Bogdanovite: (Au,Te,Pb)3(Cu,Fe)

Comments: Heavy mineral concentrate with ilmenite (ilm), pyroxene (pyr) and bogdanovite (bgd) grains.
Location: Skaergaard intrusion, Greenland. Scale: See Images.
© Diederik Visser

Braitschite-(Ce): (Ca,Na2)7(Ce,La)2B22O43·7(H2O)

Comments: Aggregates of white to red-brown platy Braitschite-(Ce) in halite matrix.
Location: Cane Creek near Moab, Grand Co., Utah, USA. Scale: Specimen Size 2x2.5 cm.
© Diederik Visser

Bykovaite: BaNa{(Na,Ti)4[(Ti,Nb)2(OH,O)3Si4O14](OH,F)2}·3H2O

Comments: Creamy transparent silky bykovaite crystals in matrix.
Location: Mt. Alluaiv, Lovozero, Kola, Russia. Scale: Not Given.
© Diederik Visser

Calciotantite: Ca(Ta,Nb)4O11  
Tantalite-(Mn): MnTa2O6

Comments: SEM image showing calciotantite (CT), manganotatntalite (MTT), microlite (MT) and lithiowodginite (LW) association.
Location: Granitic pegmatites, Kalba, Kazakhstan. Scale: Scale bar 100 µm and 10 µm.
© Diederik Visser