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Minerals

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Kvačekite from Bukov: (a) reflected light image of kvačekite (white) associated with nickeltyrrellite (yellowish brown) and berzelianite (greenish blue). Holotype sample P1P 26/2023. Mineral

Kvačekite

kvačekite

Formula
NiSbSe
Kyanite, the blue bladed mineral, has composition Al2SiO5. It is a relatively common metamorphic mineral in high-pressure aluminous rocks. Here it is surrounded by quartz. The patch of white paint is about 2 cm across. Mineral

Kyanite

kyanite

Formula
Al2OSiO4
Mohs
4.5
Mineral

Kyanoxalite

kyanoxalite

Formula
Na7(Al5-6Si6-7O24)(C2O4)0.5-1.0·5H2O
Photo of the only naturally occuring sample of Kyawthuite, which is on display at the Natural History Museum of Los Angeles. Mineral

Kyawthuite

kyawthuite

Formula
Bi³⁺Sb5+O4
Mineral

Kyrgyzstanite

kyrgyzstanite

Formula
ZnAl4(SO4)(OH)12*3H2O
Vanadium and vanadium-bearing minerals in the Bragino massive sulfide ores: (a–d) Fe-V oxides; (e,f) Ti-V oxides; (g,h) Sc-V-bearing crichtonite group minerals (a–i), secondary electron and back-scattered electron images, respectively; Ab, albite; Byr, byrudite; Chl, chlorite; Cou, coulsonite; Cri, cricthonite group minerals; Fbr, ferberite; Ilm, ilmenite; Kyz, kyzylkumite; Ms, muscovite; Mol, molybdenite; Nol, nolanite; Po, pyrrhotite; Py, pyrite; Qz, quartz; Rt, rutile; Sd, siderite; Sen, senaite; Sp, sphalerite). The image is published in an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Mineral

Kyzylkumite

kyzylkumite

Formula
V³⁺Ti2O5(OH)
Kësterite, Mushistonite Locality: Mt Xuebaoding, Pingwu County, Mianyang Prefecture, Sichuan Province, China (Locality at mindat.org) Size: 1.4 x 1.3 x 1.3 cm. This is a fine specimen where the Kesterite is coated with elegant green Mushistonite. The underlain Kesterite is actually a black metallic color, and is totally enveloped by the layer of Mushistonite. There appears to be a tiny spot of Malachite on the specimen as well. Mineral

Kësterite

kësterite

Formula
Cu2ZnSnS4
Mohs
4.5
Köttigite Locality: Silbereckle Mine, Reichenbach, Lahr, Black Forest, Baden-Württemberg, Germany Field of view 8 mm Mineral

Köttigite

köttigite

Formula
Zn3(AsO4)2·8H2O
Mineral

Laachite

laachite

Formula
(Ca,Mn)2Zr2Nb2TiFeO14
Labuntsovite-Fe xls to 0.5-0.6 mm. Gift of László and Elsa Horváth (Sept 2000) from an analyzed find of 1996 in a hornfelsized shale xenolith. MOB coll. These xls are not large but they are much bigger (and better) than any of the labuntsovite-Mn that I found in the miarolitic cavities (Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada). There are even slightly bigger xls on this specimen, but these are the best ones that are not lying flat on the matrix. This is actually a view into one of the small seams visible on the side of http://www.mindat.org/photo-173866.html The matrix is full of tiny pyrrhotite xls, some of which grow freely into the seams. The interiors are very fresh and bright and the surfaces of embedded xls can also be bright. But the xls that grow into the seams are tarnished and dark. The ones I have are too small to photograph with acceptable results. There is a stereo child photo. Mineral

Labuntsovite-Fe

labuntsovite-Fe

Formula
Na4K4Fe²⁺2Ti8O4(Si4O12)4(OH)4·10-12H2O
:Locality: Kovdor Zheleznyi Mine, Kovdor Massif, Kola, Northern Region, Russian Federation Size: 1.2 × 1 × 1 cm Description: Red to orange labuntsovite-Mg crystals from the type locality. Transparent, well defined and contrasting on the carbonatite matrix. Mineral

Labuntsovite-Mg

labuntsovite-Mg

Formula
Na4K4Mg2Ti8O4(Si4O12)4(OH)4·10-12H2O
White core of tsepinite-Na with an epitaxial growth of orange Labuntsovite-Mn crystal from the famous Aris Quarry (Windhoek, Khomas Region, Namibia). Mineral

Labuntsovite-Mn

labuntsovite-Mn

Formula
Na4K4Mn²⁺2Ti8O4(Si4O12)4(OH)4·10-12H2O
Mineral

Labyrinthite

labyrinthite

Formula
(Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3
Tan aggregates of the rare phosphate mineral lacroixite in amblygonite from this Colorado locality (Mica Load, Canon City Area, Fremont County, Colorado, United States of America) and associated to very nice purple lepidolite. This combination was once known as natromontebrasite, the name has now been discredited as it is lacroixite and amblygonite. Ex Ralph E. Merrill collection. Mineral

Lacroixite

lacroixite

Formula
NaAl(PO4)F
Dark red-black crystals of laffittite, a very rare silver-mercury mineral of formula AgHgAsS3, associated to orpiment and realgar. From Getchell Mine, Humboldt County, Nevada, United States of America. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Laffittite

laffittite

Formula
AgHgAsS3
Mineral

Laflammeite

laflammeite

Formula
Pd3Pb2S2
Mineral

Laforêtite

laforêtite
Brownish Lafossaite crystals. Fumarole F 11, La Fossa Caldera, Vulcano Island, Eolian Island, Lipari, Italy. Picture size 4 mm Mineral

Lafossaite

lafossaite

Formula
Tl(Cl,Br)
Mineral

Lagalyite

lagalyite

Formula
Ca2xMn1-xO2*1.5-2H2O
Mineral

Lahnsteinite

lahnsteinite

Formula
Zn4(SO4)(OH)6·3H2O
Black crystals of the rare Fe silicate mineral laihunite from Japan (Kamitaga, Atami City, Shizuoka Prefecture, Honshu Island, Japan). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Laihunite

laihunite

Formula
Fe²⁺Fe³⁺2(SiO4)2
Mohs
6
Grey crystals of this very rare bismuth selenide from one of the most famous localities from the species: Falun Mine, Falun, Dalarna, Sweden. Mineral

Laitakarite

laitakarite

Formula
Bi4Se3
Analyzed polished section of the very rare zirconium mineral lakargiite from the TL in Lakargi Mountains (Lakargi Mountain, Upper Chegem Caldera, Baksan Valley, Kabardino-Balkaria, Russian Federation). Ex. Erich Laskowski collection (USA). Mineral

Lakargiite

lakargiite

Formula
CaZrO3
Mineral

Lakebogaite

lakebogaite

Formula
NaCaFe2H(UO2)2(PO4)4(OH)2·8H2O