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Mineralati

Minerals

6323 results

White crystal group of the very rare mineral sylhydrite from Oregon (Rome, Malheur County, Oregon, United States of America). Sylhydrite is a mineral with a composition similar to quartz but thousands of times rarer than quartz! Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Silhydrite

silhydrite
(a) Polished sample with gehlenite–andradite–pseudowollastonite paralava in hornfels. Hornfels––the dark part represents weakly altered gehlenite–flamite rock, the light part altered hornfels in which flamite is replaced by silicocarnotite and Ca-hydroxides, and gehlenite by hydrogarnet. In the paralava, the minerals are coloured as follows: Ti-bearing andradite––dark brown, gehlenite––light brown, wollastonite, flamite and pseudowollastonite––white. (b) A polished thin-section from the central part of the sample is shown in Figure 1a. (c) Silicocarnotite forms single crystals and rims on fluorapatite crystals. A crystal of V-bearing silicocarnotite is marked in the lower part of the image. (d) U-bearing pseudowollastonite, vorlanite and aradite aggregate in a large pseudowollastonite grain. (e) Reaction zone of rankinite between flamite and pseudowollastonite. Ara = aradite, Adr = andradite, Fmt = flamite, Fap = fluorapatite HSi = Ca-hydrosilicate, Gh = gehlenite, Jcb = jacobsite, Pwo = pseudowollastonite, Rnk = rankinite, Scnt = silicocarnotite, Vrl = vorlanite. Mineral

Silicocarnotite

silicocarnotite

Formula
Ca5[(PO4)(SiO4)](PO4)
Mineral

Siligiite

siligiite

Formula
[Pb(H2O)5(SO4)][Zn9(OH)18]
Mineral

Silinaite

silinaite

Formula
NaLiSi2O5 * 2H2O
This sample contains mostly muscovite and quartz, but sillimanite (Al2SiO5) needles can also be seen (especially if you look at the high resolution image). It is about 8 cm across. Mineral

Sillimanite

sillimanite

Formula
Al2OSiO4
Sillénite, Bismuth Locality: Sauschwart Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany Greenish yellow Sillénite, surrounding remnant core of unaltered bismuth. Field of view 4 mm. Specimen and photo Leon Hupperichs. Mineral

Sillénite

sillénite
Mineral

Silvialite

silvialite

Formula
Ca4Al6Si6O24(SO4)
Mineral

Simferite

simferite

Formula
LiMg(PO4)
Mineral

Simmonsite

simmonsite

Formula
Na2LiAlF6
White crystal aggregates of the extremely rare organic mineral simonellite from the type and only known locality worldwide in Italy: Fognano, Montepulciano, Siena Province, Tuscany. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Simonellite

simonellite

Formula
C19H24
Mineral

Simonite

simonite
Simonkolleite Field of view: 0.4 mm Locality: Herzog Julius smelter, Astfeld, Langelsheim, Goslar District, Lower Saxony, Germany (locality at mindat.org) Mineral

Simonkolleite

simonkolleite

Formula
Zn5Cl2(OH)8·H2O
Mineral

Simplotite

simplotite

Formula
CaV⁴⁺4O9·5H2O
Simpsonite Locality: Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil (Locality at mindat.org) Size: 1.6 x 1.5 x 1.8 cm. A sharp, lustrous, richly colored crystal that is doubly-terminated on top and bottom, though contacted on back. This piece was brought up from Brazil by Fred Pough in the 1940s when he made a famous find here (published 1945). He sold it in the late 1940's to Alex Mann of NYC. Mineral

Simpsonite

simpsonite

Formula
Al4Ta3O13(OH)
Sincosite, Minyulite Locality: Ross Hannibal Mine (North Star Mine; Hannibal Mine; and Mikado Mine), Lead District, Lawrence County, South Dakota, USA (Locality at mindat.org) A specimen with unusally deep green crystals, scattered about on matrix and with an associated spray of white, acicular minyulite. Exceptional quality and richness for this find (early 1990s by Tom Loomis), and such are scarce on the market today. 5.5 x 5 x 4 cm Mineral

Sincosite

sincosite

Formula
Ca(VO)2(PO4)2·4H2O
Locality: Ratnapura, Ratnapura District, Sabaragamuwa Province, Sri Lanka Dimensions: 1.5 cm x 1.0 cm x 0.6 cm Sinhalite certainly has an interesting story behind it. This material was long thought to be brown peridot until it was investigated in 1952 and found to be a new mineral. The material gets is name from the old Sanskrit word for Ceylon (now Sri Lanka) "sinhala." This particular stone, 9.53 carats, is a clean, light golden yellow piece of rounded gem rough. It is usually found in metamorphic contacts in limestone like the skarn zones in Tanzania or in Warren County, New York. This is a rare gem, and despite its rarity, it occurs in very large gems from Sri Lanka. Stones between 1-5 carats are not unheard of. A very cool stone and good sized for the material. Acquired in the early 1990s. From near Niriella. Ex. Hoppel Collection. Mineral

Sinhalite

sinhalite

Formula
MgAlBO4
Mineral

Sinjarite

sinjarite

Formula
CaCl2·2H2O
Sinkankasite Locality: Barker-Ferguson Mine, Keystone, Keystone District, Pennington County, South Dakota, USA (Locality at mindat.org) Size: miniature, 4.8 x 4.2 x 2.3 cm Sinkankasite A very rich and rare example of this rare phosphate species named after noted author and collector, John Sinkankas. I used to live down the street from him and he sold me a half dozen of these in the late 90s. Beyond that stash, I simply have not seen any good ones for sale since. This is extremely rare material, and hard to obtain today. Mineral

Sinkankasite

sinkankasite

Formula
Mn²⁺Al(PO3OH)2(OH) · 6H2O
Well formed bronze colored crystal of the extremely rare sinnerite. Sinnerite is only found in two localities worldwide and Lengenbach is the type locality. Find of 1995. The number of confirmed sinnerite specimens from Lengenbach was only 19 until 2002 and this number later grew to only 32 (!) in 2008, so it is a real rarity !!. (Faszination Lengenbach book, 2008). Mineral

Sinnerite

sinnerite

Formula
Cu6As4S9
Crystal structure of mineral sinoite (silicon oxynitride, Si2N2O). Red: O, blue: N, gray: Si. Ohashi, Masayoshi et al. (1993). "Solid Solubility of Aluminum in O'-SiAlON". J. Am. Ceram. Soc. 76: 2112-2114. DOI:10.1111/j.1151-2916.1993.tb08343.x. Mineral

Sinoite

sinoite

Formula
Si2N2O
Pale brown crystals of the rare mineral sitinakite from the type locality in Russia (Kukisvumchorr Mountains, Khibiny Massif, Murmansk Oblast, Russian Federation). Original material from the author. Ex.Dr.Hartel collection. Mineral

Sitinakite

sitinakite

Formula
KNa2Ti4(SiO4)2O5(OH)·4H2O
Outstanding dark orange crystals of the very rare mineral siudaite (IMA 2017-092) from the type and only known locality worlwide in Khibiny: Eveslogchorr Mountain, Khibiny Massif, Murmansk Oblast, Russian Federation. Mineral

Siudaite

siudaite

Formula
Na8(Mn²⁺2Na)Ca6(Fe³⁺Mn²⁺)3Zr3NbSi24(Si,☐,Ti)O74(OH)2Cl·5H2O
Mineral

Siwaqaite

siwaqaite

Formula
Ca6Al2(CrO4)3(OH)12·26H2O
Gersdorffite [Var. Antimonian Gersdorffite - Corynite]- Greinig adit, Gaisberg, Olsa, Friesach, Friesach - Hüttenberg area,Carinthia, Austria (4x3.6cm) Mineral

Skaergaardite

skaergaardite

Formula
PdCu