Tom Loomis's Image Gallery

Stokesite: CaSnSi3O9·2(H2O)  
Stannomicrolite: (Sn++,Fe++,Mn++)(Ta,Nb,Sn++++)2(O,OH)7

Comments: Stokesite "ball" composed of lath-like tan or clear crystals with several micro crystals of yellow stannomicrolite.
Location: Urucum mine, Galileia, Minas Gerais, Brazil. Scale: 1.2 cm.
© Tom Loomis / Dakota Matrix

Strengite: Fe+++PO4·2(H2O)  
Cacoxenite: (Fe+++,Al)25(PO4)17O6(OH)12·75(H2O)

Comments: Lilac colored, spear-head shape crystals of strengite to 5mm in large, open vug associated with golden fibrous cacoxenite.
Location: Coon Creek, Polk Co., Arkansas, USA. Scale: Picture size 2 cm.
© Tom Loomis / Dakota Matrix

Strengite: Fe+++PO4·2(H2O)  
Kidwellite: Na(Fe+++,Cu)9+x(PO4)6(OH)11·3(H2O)

Comments: Spherical, crystalline aggregate of purple strengite on green kidwellite.
Location: Three Oak Gap, Polk Co., Arkansas, USA. Scale: Crystal size 2 mm.
© Tom Loomis / Dakota Matrix

Struvite: (NH4)MgPO4·6(H2O)

Comments: Yellow-brown tabular struvite crystal. Struvite is of organogenic origin and this type locality example is formed in manure pits.
Location: Nicolaikirche, Hamburg, Germany. Scale: Specimen Size 1 x 1 x 1 cm.
© Tom Loomis / Dakota Matrix

Sundiusite: Pb10(SO4)Cl2O8

Comments: Clear to white platy crystals to 1mm covering Hausmannite matrix.
Location: Langban, Varmland, Sweden. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Surite: (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Al,Fe+++)2(Si,Al)4O10(OH)2]·n(H2O)

Comments: Pearly white, almost micaceous surite crystals on vuggy matrix with yellow cerussite.
Location: Mammoth-Saint Anthony Mine, Tiger, Pinal Co., Arizona, USA. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Swedenborgite: NaBe4SbO7

Comments: Water clear, prismatic crystal of swedenborgite on matrix. Under UV light it glows intense blue.
Location: Langban, Varmland, Sweden. Scale: Crystal size 1 mm.
© Tom Loomis / Dakota Matrix

Tavorite: LiFe+++(PO4)(OH)  
Hureaulite: Mn5(PO3OH)2(PO4)2·4(H2O)

Comments: Lime green tavorite micro crystals with pink, gemmy hureaulite.
Location: Tip Top mine, Custer Co., South Dakota, United States. Scale: Picture size 1.0 cm.
© Tom Loomis / Dakota Matrix

Tazieffite: Pb20Cd2(As,Bi)22S50Cl10

Comments: Tiny acicular, metallic tazieffite crystals free-standing on matrix formed by volcanic sublimation.
Location: Mutnovsky Volcano, Kamchatka, Russia. Scale: Specimen size 0.8 x 0.5 x 0.5 cm.
© Tom Loomis / Dakota Matrix

Tengerite-(Y): Y2(CO3)3·2-3(H2O)

Comments: Pearly white platy tengerite-(Y) crystals in radial sprays to 2mm and fine layers on matrix. Partially replaced by an unidentified green mineral with bright blue centers that is probable decrespignyite-(Y).
Location: Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia. Scale: Overall: 4.5 x 1 x 4 cm.
© Tom Loomis / Dakota Matrix

Thalfenisite: Tl6(Fe,Ni,Cu)25S26Cl

Comments: Polished 2mm fragment of thalfenisite in epoxy mount..
Location: Oktyabr'sky mine, Noril'sk, Siberia, Russia. Scale: 1.2cm across.
© Tom Loomis / Dakota Matrix

Tiemannite: HgSe

Comments: Dull steel-gray, tetragonal crystals of tiemannite to 0.5mm with modifications and striations, slight purple tinge.
Location: Rio Blanco, Pinal De Arvole, Atriagu, Queretare, Mexico. Scale: Picture size 2 mm.
© Tom Loomis / Dakota Matrix

Tiptopite: K2(Na,Ca)2Li3Be6(PO4)6(OH)2·(H2O)  
Englishite: K3Na2Ca10Al15(PO4)21(OH)7·26(H2O)  
Montgomeryite: Ca4MgAl4(PO4)6(OH)4·12(H2O)

Comments: Red montgomeryite lath-like crystals to 1mm in 2mm rosettes associated with clear, acicular sprays of tiptopite to 0.75mm and white cottonball-like crystals of englishite to 0.2mm.
Location: Tip Top mine, Custer Co., South Dakota, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Tokyoite: Ba2Mn(VO4)2(OH)

Comments: Metallic reddish brown crystals of tokyoite (< 0.3 mm) on dark gray braunite matrix.
Location: Gambatesa mine, Graveglia Valley, Genova, Italy. Scale: Picture size 4 mm.
© Tom Loomis / Dakota Matrix

Tomichite: (V,Fe)4Ti3AsO13(OH)

Comments: Section of drill core with a very rare crystal of tomichite to 1mm.
Location: Hemlo Gold mine, Ontario, Canada. Scale: Core size 2.5 cm.
© Tom Loomis / Dakota Matrix

Trechmannite: AgAsS2

Comments: Colorfull assemblege of techmannite (reddish black) with orpiment (golden yellow) and realgar (reddish orange) in white dolomite.
Location: Lengenbach quarry, Binntal, Wallis, Switzerland. Scale: Picture size 3 mm.
© Tom Loomis / Dakota Matrix

Tritomite-(Ce): (Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13

Comments: Dark brown, vitreous grains of tritomite-(Ce) in pegmatite matrix.
Location: Langesundsfjorden, Larvik, Vestfold, Norway. Scale: Crystal size 1 cm.
© Tom Loomis / Dakota Matrix

Tsepinite-Na: (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O)

Comments: Brown, needle-like crystals of tsepinite-Na in matrix.
Location: Lephke-Nelm, Lovozero, Kola, Russia. Scale: Crystal size 3 mm.
© Tom Loomis / Dakota Matrix

Tuperssuatsiaite: Na(Fe+++,Mn)3[Si8O20](OH)2·n(H2O)

Comments: Two mm golden acicular sprays of tuperssuatsiaite on matrix.
Location: Aris Quarry, Windhoek, Namibia. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Tyrolite: CaCu5(AsO4)2(CO3)(OH)4·6(H2O)

Comments: Blue-green flattened, felted, platy crystals of tyrolite to 3mm on matrix.
Location: Centennial Eureka mine, Juab Co., Utah, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix