Dave Barthelmy's Image Gallery

Proustite: Ag3AsS3

Comments: Crystal group of gemmy, red proustite. Smithsonian collection.
Location: Dolores I Mine, Chañarcillo, Atacáma Province, Chile. Scale: Specimen Size 6x8 cm.
© Dave Barthelmy

Pyrite: FeS2

Comments: Lustrous 1 - 2 cm cubes of pyrite encased in a very fine-grained sedimentary marlstone (clay and calcite).
Location: Navajun-(La Rioja)-Spain. Scale: 6x5x3 cm.
© Dave Barthelmy

Quartz: SiO2  
Calcite: CaCO3

Comments: Purple-colored druse of amethystine quartz and white calcite.
Location: Rio Grande do Sul, Brazil. Scale: Sample size 20 cm.
© Dave Barthelmy

Quartz: SiO2

Comments: Crystal druse of transparent quartz crystals.
Location: Hot Springs, Arkansas, USA. Scale: Specimen size 6 cm.
© Dave Barthelmy

Riebeckite: [ ]Na2(Fe++3Fe+++2)Si8O22(OH)2

Comments: Grayish black, coniform, massive crystals of riebeckite.
Location: Cape Province, South Africa. Scale: 8x6 cm.
© Dave Barthelmy

Robinsonite: Pb4Sb6S13

Comments: Dark gray, prismatic-acicular crystals of robinsonite on white marble.
Location: Pitone Quarry, Seravezza, Lucca, Italy. Scale: Picture size 2 cm.
© Dave Barthelmy

Sampleite: NaCaCu5(PO4)4Cl·5(H2O)

Comments: Blue, spherical, radial crystalling aggregates of sampleite on a fracture surface.
Location: North Parkes Mine, Parkes, New South Wales, Australia. Scale: Picture size 6x5 cm.
© Dave Barthelmy

Sanidine: (K,Na)(Si,Al)4O8

Comments: Blocky, opalescent crystal of sanidine.
Location: Mina La Pili, Carmago, Chihuahua, Mexico. Scale: Crystal size 3x2 cm.
© Dave Barthelmy

Satterlyite: (Fe++,Mg)2(PO4)(OH)

Comments: Cleaved nodule of brown crystalline satterlyite aggregate.
Location: Big Fish River, Yukon, Canada. Scale: 3 x 1.5 cm.
© Dave Barthelmy

Senaite: Pb(Ti,Fe,Mn)21O38

Comments: Black crystal of senaite.
Location: Presidente Kibitschek, Minas Gerias, Brazil. Scale: Crystal size 2 mm.
© Dave Barthelmy

Sphalerite: (Zn,Fe)S  
Ankerite: Ca(Fe++,Mg,Mn)(CO3)2  
Dickite: Al2Si2O5(OH)4

Comments: White, rhombohedral crystals of ankerite and dark gray, metallic sphalerite on beige dickite.
Location: Prego mine, Kladno, Czech Rebublic. Scale: Picture size 2 cm.
© Dave Barthelmy

Spodumene: LiAlSi2O6

Comments: Stacked crystals of Spodumene (Var. Kunzite).
Location: Galileia, Minas Gerais, Brazil. Scale: Crystal size 7 cm.
© Dave Barthelmy

Stellerite: CaAl2Si7O18·7(H2O)

Comments: Orange, blocky crystalline stellerite aggregate.
Location: Tambar Springs, New South Wales, Australia. Scale: Picture size 6x4 cm.
© Dave Barthelmy

Stibnite: Sb2S3

Comments: Prismatic crystals of metallic-lustered stibnite.
Location: Xikuangshan Mine, Lengshuijang, Hunan Province, China. Scale: Crystal size 5-10 cm.
© Dave Barthelmy

Stilbite-Ca: NaCa4[Al8Si28O72]·n(H2O) (n=28-32)  
Apophyllite: KCa4(Si4O10)2F·8(H2O)  
Apophyllite-(KOH): KCa4Si8O20(OH,F)·8(H2O)

Comments: 3 cm. pink-colored rosette of stilbite and clear "apophyllite" (probably hydroxyapophyllite) in an amygdaloidal cavity.
Location: Aurangabad District, Jalgaon, India. Scale: Specimen size 6 cm.
© Dave Barthelmy

Sulvanite: Cu3VS4

Comments: Cubic grains of bronze-gray sulvanite crystals in marble.
Location: Val Bona quarry, Carrara, Italy. Scale: Picture size 1 cm.
© Dave Barthelmy

Titanite: CaTiSiO5  
Amesite: Mg2Al(SiAl)O5(OH)4

Comments: Green titanite (sphene) crystals on purple chromamesite (clinochlore?).
Location: Saranovskaya Deposit, Middle Ural Mountains, Russia. Scale: Picture size 7 cm.
© Dave Barthelmy

Trona: Na3(CO3)(HCO3)·2(H2O)  
Nahcolite: NaHCO3

Comments: Massive, coarse-grained Trona from a drill core of the upper mixed-layer Saltbed. White areas are nahcolite alteration.
Location: Searles Lake, San Bernardino County, California, USA. Scale: 12 x 15 cm.
© Dave Barthelmy

Tsugaruite: Pb4As2S7

Comments: Dark gray veinlet of tsuraruite in matrix.
Location: Yunosawa mine, Tsugaru District, Aomori Prefecture, Japan. Scale: Picure size 3x2 cm.
© Dave Barthelmy

Ulexite: NaCaB5O6(OH)6·5(H2O)

Comments: Tray of fibrous Ulexite fragments which have been cut and polished perpendicular to the fibers. This shows the fiber-optic "TV stone" effect which transmit images through the fragments.
Location: U.S. Borax Mine, Boron, Kramer District, Kern County, California, USA. Scale: Picture size 10 cm.
© Dave Barthelmy