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6323 results

Mineral

Lunijianlaite

lunijianlaite

Formula
Li0.7Al6.2(AlSi7O20)(OH,O)10
Steel-gray metallic microspecimens of the extremely rare iron silicide luobusaite from a third known locality (Poltava Series, Zachativsk Station, Donets Region, Donetsk Oblast', Ukraine), intermixed with white and colorless quartz crystals. Analyzed specimen by SEM/EDS. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Luobusaite

luobusaite

Formula
Fe0.84Si2
Mineral

Luogufengite

luogufengite
Mineral

Luoxianchangite

luoxianchangite

Formula
Ag8SnS4Se2
Mineral

Lusernaite-(Y)

lusernaite-(Y)

Formula
Y4Al(CO3)2(OH,F)11·6H2O
Mineral

Lussierite

lussierite

Formula
Na10[(UO2)(SO4)4](SO4)2(H2O)3
cristal de luxembourgite dans la dolomite, photo de l'échantillon type (C MnhnL) Mineral

Luxembourgite

luxembourgite

Formula
AgCuPbBi4Se8
Mohs
3
Colour
grey
Luzonite, Pyrite Locality: Pen-Shan Ore Body, Chinkuahshih Mine, Jui-Fang Town, Taipei County, Taiwan Province, Taiwan (Locality at mindat.org) Size: 5.0 x 3.6 x 2.9 cm. Luzonite is an uncommon copper, arsenic sulfosalt. This fine, rich, 3-dimensional specimen of nearly solid, reddish-gray, metallic-lustre luzonite crystals to 5 mm is nicely accented by a scattering of pyrite crystals. Luzonite is especially desirable from this now defunct quarry in Taiwan. Very rich, highly representative material of this uncommon species from this extinct locale. Mineral

Luzonite

luzonite

Formula
Cu3AsS4
Mohs
3.5
Mcbirneyite is a very rare copper-vanadate mineral, forms tiny black crystals as inclusions or epitaxially grown with green stacked grown lammerite. The associating minerals are tiny black-red lyonsite needles, emerald green piypite needles and rich black microcrystalline coatings of hematite and orange microcrystalline coating of antimony bearing rutile. Very interesting and super rare combination. From: Yadovitaya Fumarole, Great Fissure, Tolbachik, Far Eastern Region, Russian Federation. Mineral

Lyonsite

lyonsite
Långbanite Locality: Långban, Filipstad, Värmland, Sweden (Locality at mindat.org) Size: 4.8 x 2.5 x 1.2 cm Langbanite is a very rare complex silicate and this rich and fine old-time specimen is from the namesake Type Locality in Sweden. This rich, two-sided matrix sliver features numerous sub-metallic, orthorhombic crystals including a large 5 mm crystal. Ex. Charles Velte Collection. Mineral

Långbanite

långbanite

Mohs
6.5
:Locality: Harstigen Mine, Persberg, Värmland, Sweden Description: Fibrous aggregates with beige tone, the semiquantitative SEM-EDS results indicate the presence of As, Pb, Mn and Mg in percentages those indicate: långbanshyttanite. Mineral

Långbanshyttanite

långbanshyttanite

Formula
Pb2Mn2Mg(AsO4)2(OH)4·6H2O
Låvenite Locality: Låven (Skådön; Lamö; Lamanskjaer), Langesundsfjorden, Larvik, Vestfold, Norway (Locality at mindat.org) Size: 3.8 x 3.8 x 2.9 cm. This is a relatively well-formed, sharp lavenite crystal. It is 4mm tall, and embedded partially in matrix. Ex. American Museum of Natural History, J.P. Morgan, and Clarence Bement Collections. Mineral

Låvenite

låvenite
Mineral

Lévyclaudite

lévyclaudite
Lévyne Locality: Teviot Brook, Boonah Shire, Queensland, Australia Field of view 8 mm. Levyne xls, almost free of erionite coating. Collected by Vic Cloete at Black Cattle Creek, a few km west of Teviot Brook. Specimen and photo Leon Hupperichs. Mineral

Lévyne-Ca

lévyne-Ca

Formula
Ca3(Si12Al6)O36·18H2O
Mohs
4
Mineral

Lévyne-Na

lévyne-Na

Formula
Na6(Si12Al6)O36·18H2O
Mineral

Línekite

línekite

Formula
K2Ca3[(UO2)(CO3)3]2·7H2O
A sample of potassium dichromate, also known as the mineral lopezite. About 10 mm long, probably synthetically grown. Mineral

Lópezite

lópezite

Formula
K2Cr2O7
Mohs
2.5
Löllingite, quartz and feldspar from Rinsey, Great Britain (original German lable reads "Tremearneküste, Rinsey, Großbritannien). The Eurocent allows size comparison. Mineral

Löllingite

löllingite

Formula
FeAs2
Löweite Locality: Le Cetine di Cotorniano Mine (Le Cetine Mine; Cetine Mine; Rosia), Chiusdino, Siena Province, Tuscany, Italy Yellow Löweite (analysed). Field of view 3 mm. Specimen and photo Leon Hupperichs. Mineral

Löweite

löweite

Formula
Na12Mg7(SO4)13(H2O)15
A nodule of white fine fibrous lüneburgite. A fine example of this uncommon borate from the type locality (Lüneburg, Lower Saxony, Germany). Ex. Erich Laskowski collection. Mineral

Lüneburgite

lüneburgite

Formula
Mg3[B2(OH)6(PO4)2]·6H2O
Mohs
2
Very dark red, almost black, microcrystals of the rare mineral macaulyite on a contrasting matrix of illite and kaolinite. From: Bennachie, Inverurie, Buchan Grampian, Scotland, United Kingdom. Ex-British Museum Natural History London specimen. Mineral

Macaulayite

macaulayite

Formula
(Fe,Al)24Si4O43(OH)2
White sprays of Macdonaldite (Field of view 4 mm) Locality: Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno County, California, USA (Locality at mindat.org) Blue botryoidal crust of McGuinnessite. Field of view 6 mm. Specimen and photo Leon Hupperichs. Mineral

Macdonaldite

macdonaldite

Formula
BaCa4Si16O36(OH)2·10H2O
Mineral

Macedonite

macedonite

Formula
PbTiO3
Mohs
5.5
Macfallite Locality: Manganese Mine, Copper Harbor, Keweenaw County, Michigan, USA (Locality at mindat.org) Size: miniature, 4 x 2.3 x 2.1 cm Macfallite A mostly massive specimen with some embedded crystals as well, showing. Rare old material, this is a calciam manganese, aluminum silicate. Never seen another for sale. Mineral

Macfallite

macfallite

Formula
Ca2Mn³⁺3(SiO4)(Si2O7)(OH)3