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Minerals

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Outstanding pale beige crystals of the extremely rare thorium mineral tuliokite from the type and only known locality in Khibiny: Kirovskii Mine, Kukisvumchorr Mountain, Khibiny Massif, Murmansk Oblast, Russian Federation. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Tuliokite

tuliokite

Formula
Na6BaTh(CO3)6·6H2O
Mineral

Tululite

tululite

Formula
Ca14(Fe³⁺,Al)(Al,Zn,Fe³⁺,Si,P,Mn,Mg)15O36
FOV 4.7 x 4.0 mm. Via Jean-Pierre Beckerich. Formerly MOB coll. This specimen was extensively studied (as MSH UK110) at Laurentian University. It is now in the collection at ROM. This is an old single focus film photo taken before the analysis commenced. This material was found in the vicinity of the Poudrette pegmatite but I'm not sure exactly where. The matrix looks more like the contact zone (aplite) or a "tributary" vein in hornfels than pegmatite proper. The tumchaite is associated with abundant gaidonnayite and JP sold it to me as a gaidonnayite specimen. When I couldn't identify the platy stuff I sent it off to Dr. AMcD. He was working on the characterization when he found that it was already proposed as IMA1999-10 from Vuoriyarvi. Mineral

Tumchaite

tumchaite

Formula
Na2Zr(Si4O11)·2H2O
:FOV 2.7 x 2.2 mm. Via Jean-Pierre Beckerich. This is from the same analyzed find as http://www.mindat.org/photo-177620.html Note the orangey color of the terminations. This depends on the orientation of the light source. Crystals from this find were thoroughly analyzed via long exposure XRD and EDS. Locality: Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada Mineral

Tundrite-(Ce)

tundrite-(Ce)

Formula
Na2Ce2TiO2(SiO4)(CO3)2
Mineral

Tundrite-(Nd)

tundrite-(Nd)

Formula
Na2Nd2TiO2(SiO4)(CO3)2
Tunellite Locality: Boron, Kramer District, Kern County, California, USA (Locality at mindat.org) Size: miniature, 5 x 4.3 x 2.5 cm Tunellite A very nice cluster of well-formed crystals to 3 cm from this classic locality. Few were saved as they came out, and specimens of this quality are hard to obtain today. Note that this rare borate is stable. Mineral

Tunellite

tunellite

Formula
SrB6O9(OH)2·3H2O
:Polished epoxy microprobe 17.6 x 15 x 1.7 mm preparate containing a 0.5 mm shiny metallic grain of pure, analyticaly confirmed by microprobe, native tungsten, one of the rarest native elements, known only from a few localities worldwide. Analysis performed by Pavel Kartashov. This material was extracted in 2006 from heavy and very big (60 tons) concentrates of quartz vein Nº91 at southern slope of Dodo Mt., Prepolar Ural, Khanty-Mansi okrug, Tyumen oblast', Russia. Very limited number of grains of native Tungsten from this find survive up to now. The vast majority of the grains was thrown out because nobody was able to imagine, that these "arsenopyrite" grains turned out to be native Tungsten !!. The type locality for Tungsten is located some km Eastern from this quartz vein Nº91, in gold placers of Bol'shata Pol'ya river. So, it is very probable that the initial source of Tungsten be in river placers of Dodo Mt. slopes. Type material from Bol'shaya Pol'ya placers is impregnated by microscopic inclusions of Yttrialite-(Y). In difference from the type material, Tungsten from this find in vein Nº91 is absolutely pure. Native Tungsten is a relatively new mineral, since it was approced by the IMA as recently as 2011 (IMA 2011-004). Mineral

Tungsten (Native)

tungsten (native)

Formula
W
Metallic black crystal of the tungsten mineral tungstenite from the most famous locality for the mineral: Crevoladossola Quarry, Ossola Valley, Crevoladossola, Novara, Ossola Valley, Piedmont, Italy. Good contrast with the matrix. Mineral

Tungstenite

tungstenite

Formula
WS2
Dark green globular aggregates of tungstibite crystals from the type locality (Clara Mine, Wolfach, Black Forest, Baden-Württemberg, Germany) and one of the only three localities known worldwide. Tungstibite is a very rare tungsten-antimony mineral. Mineral

Tungstibite

tungstibite

Formula
Sb2WO6
Bright yellow massive tungstite on ferberite from Calacalani, Bolivia. Photograph taken at the Natural History Museum, London. Mineral

Tungstite

tungstite

Formula
WO3·H2O
Tungusite Locality: Newbury Park, Ventura Co., California, USA Green Tungusite. Field of view 5 mm. Specimen and photo Leon Hupperichs. Mineral

Tungusite

tungusite

Formula
Ca4Fe2Si6O15(OH)6
Outstanding sharp gemmy crystals of the rare mineral tunisite from one of the only three known localities worldwide: Condorcet, Auvergne-Rhône-Alpes, France. Mineral

Tunisite

tunisite

Formula
NaCa2Al4(CO3)4(OH)8Cl
Tuperssuatsiaite Locality: Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek, Windhoek District, Khomas Region, Namibia (Locality at mindat.org) Field of view 5 mm. Depth of field is achieved with CombineZM. Specimen and photo Leon Hupperichs. Mineral

Tuperssuatsiaite

tuperssuatsiaite

Formula
Na2Fe3Si8O20(OH)2·4H2O
Green crystals of the very rare copper vanadate mineral turanite from one of the only four known localities worldwide. From: The Fish, Gibellini District, Eureka County, Nevada, United States of America. Mineral

Turanite

turanite

Formula
Cu5(VO4)2(OH)4
Mineral

Turkestanite

turkestanite

Formula
(K,☐)(Ca,Na)2ThSi8O20·nH2O
Turneaureite Locality: ZCA No. 4 Mine (St Joe Mine), Balmat, Balmat-Edwards Zinc District, St. Lawrence County, New York, USA Dimensions: 20.5 cm x 9.4 cm x 4.5 cm Turneaureite is a rare Apatite Group species, rich in arsenic. This large layered block contains seams of turneaureite that fluoresce bright orange under SW UV light. The piece is from the well-known ZCA No. 4 Mine at Balmat, the Co-type Locality. Not pretty to look at, but certainly a large and important New York and species rarity. Mineral

Turneaureite

turneaureite

Formula
Ca5(AsO4)3Cl
Turquoise with quartz Gemstone

Turquoise

Formula
CuAl6(PO4)4(OH)8·4H2O
Mohs
5–6
Colour
Blue to green
Mineral

Turtmannite

turtmannite

Formula
(Mn,Mg)22.5Mg3-3x((V5+,As5+)O4)3(As³⁺O3)x(SiO4)3O5-5x(OH)20+x
Tuscanite Field ov view: 3 mm Locality: Mt. Cavalluccio, Sacrofano, Roma, Lazio, Italy Mineral

Tuscanite

tuscanite

Formula
(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2])·H2O
Yellow crystal aggregates of tusionite, a very rare Mn-Sn borate, from one of the only three known localities worldwide: Řečice, Vysočina Region, Moravia, Czech Republic. Mineral

Tusionite

tusionite

Formula
Mn²⁺Sn4+[BO3]2
Mineral

Tuzlaite

tuzlaite

Formula
NaCaB5O8(OH)2·3H2O
Tučekite on ullmannite Field of view: 4 mm Locality: Adler Quarry (Adler mine), Eisern, Siegen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany (locality at mindat.org) Mineral

Tučekite

tučekite
Very small black inclusions of the rare Hg mineral tvalchrelidzeite from Getchell mine (Humboldt County, Nevada, United States of America). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Tvalchrelidzeite

tvalchrelidzeite

Formula
Hg3SbAsS3
Light beige crystal aggregates of the rare Ca-Be silicate mineral tvedalite from the type locality in Tvedal, Norway (Vevja Quarry, Tvedalen, Larvik, Vestfold og Telemark, Norway). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Tvedalite

tvedalite

Formula
(Ca,Mn)4Be3Si6O17(OH)4·3H2O