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Minerals

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Metallic microinclusions of the extremely rare Ag mineral larosite from the type locality in Foster mine (Foster Mine, Coleman Township, Cobalt, Timiskaming District, Ontario, Canada) in a matrix of chalcosine, in an analyzed specimen by SEM/EDS by the former owner of the specimen (the Vandenbroucke Museum) but the analysis is no longer available. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Larosite

larosite

Formula
(Cu,Ag)21PbBiS13
Mineral

Larsenite

larsenite

Formula
PbZnSiO4
Lasalite Locality: Vanadium Queen Mine, La Sal Creek Canyon, Paradox Valley District, Paradox Valley, San Juan Co., Utah, USA Bright orange crystalline crust of Lasalite. This nice specimen was acquired from Tom Loomis and was tested by Bob Jenkins at the University of Arizona using Raman spectroscopy. This specimen contains no Pascoite. Field of view 6 mm. Specimen and photo Leon Hupperichs. Mineral

Lasalite

lasalite

Formula
Na2Mg2V10O28·20H2O
Mohs
1
Colour
yellow-orange, yellow
Mineral

Lasmanisite

lasmanisite

Formula
Ag12Pb13Mn11Sb44S96
Mineral

Lasnierite

lasnierite

Formula
(Ca,Sr)(Mg,Fe²⁺)2Al(P[O,F]4)3
Latiumite Locality: Cava di Campagnano, Campagnano di Roma, Sacrofano Caldera, Rome Province, Latium, Italy (Locality at mindat.org) Size: 4.6 x 3.8 x 2.8 cm. This piece is a very classic specimen of this rare phyllosilicate. It features cream-white prismatic crystals of Latiumite measuring up to 5 mm on matrix. There are no localities for Latiumite outside of Italy, and it is only appropriate that this piece was named after the district in which it was first found. A great example of this classic material. Ex. Richard Kosnar Collection. Mineral

Latiumite

latiumite

Formula
(Ca,K)4(Si,Al)5O11(SO4,CO3)
Latrappite Locality: St Lawrence Columbium Mine, Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada (Locality at mindat.org) A SUPERB, lustrous 6 mm cube of latrappite (unanalysed)on starkly contrasting white matrix from Oka, Quebec, Canada. Latrappite is a rare Perovskite found only at Oka. 2.5 x 1.7 x 1.1 cm Mineral

Latrappite

latrappite

Formula
Ca2NbFe³⁺O6
Laueite Locality: Hagendorf South Pegmatite (Cornelia Mine; Hagendorf South Open Cut), Hagendorf, Waidhaus, Vohenstrauß, Oberpfälzer Wald, Upper Palatinate, Bavaria, Germany (Locality at mindat.org) Picture width 2,5 mm. Collection and photograph Christian Rewitzer Mineral

Laueite

laueite

Formula
Mn²⁺Fe³⁺2(PO4)2(OH)2 * 8H2O
Mohs
3
Prehnite, Laumontite Locality: Paterson, Passaic County, New Jersey, USA (Locality at mindat.org) Size: 8.6 x 4.9 x 3.4 cm. This type of pseudormorph is classic from New Jersey. You can see the original form of the laumontite crystals, now pseudomorphed by light pastel, pea-green, sparkly prehnite. Mineral

Laumontite

laumontite

Formula
CaAl2Si4O12·4H2O
Small but outstanding crystal group of the very rare sulphosalt mineral launayite in an analyzed specimen by SEM/EDS from the type locality in Canada (Taylor Pit, Huntingdon Township, Madoc, Hastings County, Ontario, Canada). Madoc is known for being the Sb-equivalent of the Lengenbach deposit (where sulphosalts there, are always the As equivalents). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Launayite

launayite

Formula
CuPb10(Sb,As)12S20
Mineral

Lauraniite

lauraniite
:2.2 x 1.7 x 1.2 cm. Laurelite is a very rare lead halide species that is only found in two confirmed localities (with a third questionable locality) in the world. This piece just happens to be from the type locality for the species, the Grand Reef Mine in Arizona. The species is named for Laurel Canyon in which the mine resides. Micro white fibrous crystals of laurelite can be seen on the specimen in association (according to the label) with artroeite, aravaipaite, calcioaravapaite with quartz and galena. I can confirm the laurelite, but I cannot say for certain if artroeite, aravaipaite and calcioaravapaite are actually present. From the collection of Paolo Matioli. Locality: Grand Reef Mine, Laurel Canyon, Grand Reef Mountain, Klondyke, Santa Teresa Mts, Aravaipa District, Graham Co., Arizona, USA Mineral

Laurelite

laurelite

Formula
Pb7F12Cl2
Mineral

Laurentianite

laurentianite

Formula
[NbO(H2O)]3(Si2O7)2[Na(H2O)2]3
(a) Blue hexagonal crystal of laurentthomasite in partially weathered pegmatite mainly composed of quartz, orthoclase, phenakite and secondary apatite. (b) Enlargement of (a). Mineral

Laurentthomasite

laurentthomasite
Laurionite Locality: Lavrion (Laurion; Laurium), Lavrion District Mines, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece (Locality at mindat.org) Size: 2.7 x 1.8 x 1.5 cm. SHARP, freestanding crystals to 5mm in a protected vug make this a REALLY fine laurionite specimen! One seldom sees such quality on the market. Old piece, ex. Bergakademie Freiberg collection (with label). Year of Discovery: 1887 at this, the type locality. Mineral

Laurionite

laurionite

Formula
PbCl(OH)
Very small single nugget of the extremely rare ruthenium sulphide mineral laurite (RuS2) from a river in Alaska (United States of America). Specimen analyzed by SEM/EDS by the former owner of the specimen (The Vandenbroucke Museum). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Laurite

laurite

Formula
RuS2
Colorless lausenite crystals associated to brown romerite. Analyzed specimen. From: Alcaparrosa Mine, Cerritos Bayos, El Loa Province, Antofagasta Region, Chile. Mineral

Lausenite

lausenite

Formula
Fe2(SO4)3*5H2O
Mineral

Lautarite

lautarite

Formula
Ca(IO3)2
Lautenthalite Field of view: 0.3 mm high Locality: Lichtloch 26, Hettstedt, Mansfeld-Südharz, Saxony-Anhalt, Germany Mineral

Lautenthalite

lautenthalite

Formula
PbCu4(SO4)2(OH)6 * 3H2O
Lautite, Löllingite Locality: Glasberg quarry, Nieder-Beerbach, Nieder-Ramstadt, Odenwald, Hesse, Germany (Locality at mindat.org) Dark grey metallic Lautite (analysed) together with white metallic Löllingite. Field of view 8 mm. Specimen and photo Leon Hupperichs. Mineral

Lautite

lautite

Formula
CuAsS
Lavendulan Locality: Maria Josefa Mine, Rodalquilar, Níjar, Almería, Andalusia, Spain Picture width 2 mm. Collection and photograph Christian Rewitzer Mineral

Lavendulan

lavendulan

Formula
NaCaCu5(AsO4)4Cl·5H2O
Mineral

Laverovite

laverovite

Formula
K2NaMn7Zr2(Si4O12)2O2(OH)4F
Lavinskyite Locality: Wessels Mine, Hotazel, Kalahari manganese field, Northern Cape Province, South Africa Size: 3 cm x 2 cm x 1.7 cm The richest known lavinskyite to date, this is a co-type specimen with a field of view 2 cm across on a specimen with overall size 3 x 2 x 1.7 cm. Lavinsky family collection. Mineral

Lavinskyite

lavinskyite

Formula
K(LiCu)Cu6(Si4O11)2(OH)4
Lavoisierite - Italy, Piedmont, Viù, Punta Gensane (TL) - 4 mm. Photos from tomeikminerals.com can be used under a Creative Commons Licenese 4.0 CC-BY, as explained in: https://www.tomeikminerals.com/about-me. Mineral

Lavoisierite

lavoisierite

Formula
Mn²⁺8[Al10(Mn³⁺Mg)][Si11P]O44(OH)12