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Crystal of shuiskite-(Cr) (a) and a twin with a (001) composition plane (b). SEM (SE) images. The image is published in an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Mineral

Shuiskite-(Cr)

shuiskite-(Cr)
shuiskite, garnet var. uvarovite : Saranovskii Mine (Saranovskoe), Saranovskaya (Sarany) Village, Gornoazavodskii area, Permskaya Oblast’, Middle Urals, Urals Region, Russia Mineral

Shuiskite-(Mg)

shuiskite-(Mg)

Formula
Ca2MgCr2(Si2O7)(SiO4)(OH)2 * 2H2O
Mineral

Shulamitite

shulamitite

Formula
Ca3TiFe³⁺AlO8
Yellow green crystals of the very rare new uranium mineral shumwayite (IMA 2015-058) on a contrasting black matrix from the type locality in Utah (Giveway-Simplot Mine, Red Canyon, San Juan County, Utah, United States of America). Mineral

Shumwayite

shumwayite
Mineral

Shuvalovite

shuvalovite

Formula
K2(Ca2Na)(SO4)3F
Small white crystal group of sibirskite from Russia (Novofrolovskoye Deposit, Turjinsk, Turya River, Krasnotur'insk, Sverdlovsk Oblast, Russian Federation). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Sibirskite

sibirskite

Formula
Ca2(HB2O5)(OH)
Mineral

Sicherite

sicherite

Formula
TlAg2(As,Sb)3S6
These mineral images are free to use how you wish. Mineral

Sicklerite

sicklerite

Formula
Li1-x(Mn³⁺xMn²⁺1-x)PO4
Black crystal group of the extremely rare nitride mineral siderazot, from: Monte Somma, Vesuvius, Campania, Italy. Nitrides are very rare in Nature, only a few are known. Mineral

Siderazot

siderazot

Formula
Fe5N2
Siderite xx on Baryte xx - Bad Lauterberg, Harz Mountains, Germany Mineral

Siderite

siderite

Formula
FeCO3
Outstanding yellow crystals of the sideronatrite, from a new discovery in Spain: Ferruginosa Mine, Cabo de Palos, Murcia, Spain. Mineral

Sideronatrite

sideronatrite
Zinnwaldite Deposit topotype - CINOVEC (ZINNWALD), ERZGEBIRGE, BOHEMIA - Czech republic (6 × 6 cm). Mineral

Siderophyllite

siderophyllite
Many single specimens of the rare Fe mineral siderotil in a capsule. From Runge Mine, Edgemont, Fall River County, South Dakota, United States of America. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Siderotil

siderotil

Formula
Fe(SO4)·5H2O
Sidorenkite is a Mn-Na-carbonate-phosphate Pinkish crystals of sidorenkite, a very rare mineral only known from a few localities worldwide. From: Alluaiv Mountains, Lovozero, Kola, Russian Federation. Mineral

Sidorenkite

sidorenkite
Mineral

Sidorovite

sidorovite

Formula
Fe3Pt
Mineral

Sidpietersite

sidpietersite

Formula
Pb²⁺4(S2O3)O2(OH)2
Cluster of dark green sidwillite crystals. Field of view 3 mm. From: Freedom No. 2 Mine, Marysvale Mining District, Piute County, Utah, USA. Specimen and photo Leon Hupperichs. Mineral

Sidwillite

sidwillite
Siegenite Locality: Buick Mine (Amax Buick Mine; Moloc Mine), Bixby, Viburnum Trend District, Iron County, Missouri, USA (Locality at mindat.org) Size: 2.4 x 2.4 x 1.2 cm. Siegenite is an uncommon cobalt, nickel sulfide and is an extremely rare mineral from Missouri’s Viburnum Trend. Isolated, extremely sharp, isometric, steel-gray siegenite crystals are very aesthetically scattered on the matrix crust and are nicely accented by contrasting chalcopyrite microcrystals. The lustrous siegenite crystals reach 5 mm. This thumbnail is very high-grade, older material from the famous Buick Mine and is seldom available in this quality. Ex. Carl Davis Collection. Mineral

Siegenite

siegenite

Formula
CoNi2S4
Sieleckiite Locality: Mount Oxide Copper mine, Mount Gordon, Gunpowder District, Mt Isa - Cloncurry area, Queensland, Australia Blue sieleckiite with green libethenite. Picture width 3 mm. Collection and photograph Christian Rewitzer Mineral

Sieleckiite

sieleckiite

Formula
Cu3Al4(PO4)2(OH)12 * 2H2O
Outstanding green crystal aggregates of the very rare Ba-Fe phosphate mineral sigismundite from a Buranga pegmatite in Rwanda (Buranga Pegmatite, Gatumba, Ngororero District, Western Province, Rwanda), associated to pyrite and phosphosiderite. Sigismundite from Rwanda is green, not beige as in other localities. Mineral

Sigismundite

sigismundite

Formula
{Ba☐}{Fe²⁺☐}{Ca}{Na2☐}{Fe²⁺13}{Al}(PO4)11(HPO4)(OH)2
Paravauxite, Sigloite Locality: Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia (Locality at mindat.org) Size: 7.8 x 4.5 x 3.8 cm. These crystals are one of the most beautiful phosphates in the world. They are highly prized for their rarity and beauty. This piece features superb, incredibly rare, sharp, semi lustrous, light green crystals of Paravauxite with tan colored crystal of Sigloite on matrix. Sigloite forms as the result of alteration from Paravauxite. This specimen is from the type locality for both species! Mark Chance Bandy described Paravauxite crystals in his book "Mineralogy of Llallagua, Bolivia". He states that Paravauxite is the most abundant of all the "Vauxites" from this mine," and with that said, you almost never see specimens, especially pieces that are larger than thumbnails available on the market. This piece is a great example of the prismatic, sheaf-like parallel growths that Mr. Bandy described. Ex. Brian Kosnar. Mineral

Sigloite

sigloite
Mineral

Sigogglinite

sigogglinite

Formula
[Pb6Zn(OH)8](SO4)3·3H2O
Mineral

Siidraite

siidraite
(d) The same image under polarized and analysed light. One of the sections has an hourglass zoning and something resembling polysynthetic twins with thin plates. Mineral

Silesiaite

silesiaite

Formula
Ca2Fe³⁺Sn(Si2O7)(Si2O6OH)