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Sharp perfect single crystal of skinnerite, a rare copper antimony sulphide known from a few localities worldwide. From: Bankov, Košice, Košice County, Košice Region, Slovakia (Slovak Republic). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Skinnerite

skinnerite

Formula
Cu3SbS3
Grey metallic crystal aggregates of the very rare Bi telluride-selenide mineral skippenite from the TL in Canada (Otish Mountains, Baie James, Nord-du-Québec, Québec). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Skippenite

skippenite

Formula
Bi2TeSe2
Sklodowskite, Quartz Locality: Animas Mine, Francisco Portillo, West Camp, Santa Eulalia District, Municipio de Aquiles Serdán, Chihuahua, Mexico (Locality at mindat.org) An excellent and aesthetic specimen of bright, canary-yellow needle sprays of sklodowskite needles nicely set in an artistic vug of sparkly, off-white quartz from Santa Eulalia, Mexico. 3.0 x 2.7 x 2.3 cm Mineral

Sklodowskite

sklodowskite

Formula
Mg(UO2)2(SiO3OH)2·6H2O
(a) Image in plane-polarised reflected light of a subhedral skogbyite crystal with a hexagonal-like outline (centre) included in poikiloblastic pinakiolite. Vague zoning can be seen in the skogbyite. Fracture fillings in the host pinakiolite partly contain Fe–Mn oxides. The scale bar equals 50 µm. (b) High-contrast back-scattered electron (BSE) image showing subhedral skogbyite crystals (medium to light grey with lighter, mainly outer, zones showing Pb enrichment in the centre and lower right) included in poikiloblastic pinakiolite (dark-grey groundmass). The BSE light to BSE white fracture fillings and irregular larger grains are Fe–Mn oxides, while BSE white crystals with a square outline are macedonite. Elongated black inclusions in the pinakiolite are subhedral crystals or aggregates of phlogopite. The scale bar equals 10 µm. Mineral

Skogbyite

skogbyite

Formula
Zr(Mg2Mn³⁺4)SiO12
Skorpionite Locality: Skorpion Mine, Rosh Pinah, Lüderitz District, Karas Region, Namibia (Locality at mindat.org) Size: 6.2 x 4 x 2.5 cm. An attractive specimen of the new species, Skorpionite. The clear-white crystals grow in beautiful sprays of needles to several mm, and the radial sprays are very rich throughout the pockets in the specimen (which is tarbuttite mixed with host rock). The Skorpionite has a beautiful yellow fluorescence. Ex. Charlie Key Collection. Mineral

Skorpionite

skorpionite

Formula
Ca3Zn2(PO4)2(CO3)(OH)2·H2O
Skutterudite and Nickeline Locality : Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco Size : (13x11cm) Mineral

Skutterudite

skutterudite

Formula
CoAs3
Mineral

Slavkovite

slavkovite

Formula
Cu13(AsO4)6(AsO3OH)4·23H2O
Slavíkite Locality: Valachov Hill, Skřivaň, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic (Locality at mindat.org) Size: 5.1 x 4.1 x 2.8 cm. Slavikite is a rare hydrated Sodium, Magnesium, Iron Sulfate, and specimens from the type locality are certainly not commonly available. This piece from the Richard A. Kosnar collection features classic pale yellow color Slavikite masses on matrix. Mineral

Slavíkite

slavíkite
White crystal aggregates of the rare strontium mineral slawsonite from Kagami, Kochi City, Kochi Prefecture, Shikoku Island, Japan. Mineral

Slawsonite

slawsonite

Formula
Sr(Al2Si2O8)
Mineral

Slottaite

slottaite

Formula
SrFe³⁺3(PO4)(SO4)(OH)6
Mineral

Sluzhenikinite

sluzhenikinite
Mineral

Slyudyankaite

slyudyankaite
Mineral

Smamite

smamite
Greyish crystal aggregates of the extremely rare bismuth tellurite smirnite from the type locality in Armenia (Zod Mine, Vardenis, Gegharkunik Province, Armenia). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Smirnite

smirnite

Formula
Bi2Te4⁺O5
Mineral

Smirnovskite

smirnovskite

Formula
(Th,Ca)(PO4)·nH2O
Bronze colored crystals of the extremely rare thallium mineral imhofite, associated to the also rare red wine smithite and realgar. From: Lengenbach Quarry, Binntal, Wallis, Switzerland. The number of confirmed imhofite specimens worldwide until 2002 was only 120 (all of them in Lengenbach, of course). Find of 1974. Imhofite is one of the rarest and most sought after thallium minerals from Lengenbach, in part due to its name related to the family Imhof, very famous in the whole Binntal. Mineral

Smithite

smithite

Formula
AgAsS2
Smithsonite - Locality: Kelley Mine, Soccorro County, New Mexico - Mineral Specimens C\01645 Mineral

Smithsonite

smithsonite

Formula
ZnCO3
Quartz (Var.: Smoky Quartz), Quartz (Var.: Amethyst) Locality: 30 miles north of Reno, Hallelujah Junction, Petersen Mountain, Washoe County, Nevada, USA (Locality at mindat.org) Size: 10.6 x 6.8 x 5.0 cm. Here we have a fine Smoky Quartz and Amethyst specimen from a new find in Hallelujah Junction in California. I obtained this specimen directly from the miner who collected it. It actually has great form and color for any locality, but is especially attractive for a U.S. piece. This is a large, sharp, lustrous, well formed, very gemmy crystal with smoky and purple "Amethyst" bi-color zoning. Certainly one of the most interesting and gemmiest pieces of this material that I have seen. Mineral

Smoky Quartz

Formula
SiO2
Mohs
7
Colour
Brown to black
Yellow smolyaninovite pseudom. after Erythrite, pale pink spheres Mansfieldite, red unaltered needles Erythrite and black Heterogenite; From: Mount Cobalt Mine, Selwyn District, Cloncurry Shire, Queensland, Australia. Photo and collection Fernando Brederodes. Mineral

Smolyaninovite

smolyaninovite

Formula
Co3Fe³⁺2(AsO4)4 * 11H2O
Smrkovecite Locality: Smrkovec (Schönficht), Slavkovský Les Mtn, Mariánské Lázně (Marienbad), Karlovy Vary Region, Czech Republic White smrkovecite with some minor yellow bismutoferrite. Field of view 3 mm. Mineral

Smrkovecite

smrkovecite

Formula
Bi2(PO4)O(OH)
Bronze crystals and crystal aggregates of the FeNi sulphide mineral smythite associated to pyrite from a locality in Montana (Helena Area, Lewis & Clark County, Montana, United States of America). A part of the specimen is polished probably showing that it was analyzed. Ex Vandenbroucke Museum collection specimen, from Waregem, Belgium. Mineral

Smythite

smythite

Formula
(Fe,Ni)3+ₓS4 (x = 0 to 0.3)
A dark brown single crystal of the rare mineral sobolevite from the famous Kola region in Russia (Alluaiv Mountain, Lovozero Massif, Murmansk Oblast, Russian Federation). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Sobolevite

sobolevite

Formula
Na6(Na2Ca)(NaCaMn)Na2Ti2Na2(TiMn)(Si2O7)2 (PO4)4O2(OF)F2
Microinclusions of two extremely rare palladium-platinum minerals, sobolevskite and insizwaite, from the famous locality of Norilsk (Oktyabr'skoye Deposit, Putoran Plateau, Eastern Siberia, Russian Federation) in a matrix of cubanite-pentlandite-chalcopyrite in a polished specimen, that was analysed. Mineral

Sobolevskite

sobolevskite

Formula
Pd(Bi,Te)
Sodalite - raw stone Mineral

Sodalite

sodalite

Formula
Na4Si3Al3O12Cl