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Minerals

6323 results

Mineral

Lalondeite

lalondeite

Formula
(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2*3H2O
Lammerite, Lemanskiite Locality: El Guanaco Mine, Guanaco (Huanaco), Santa Catalina, Antofagasta Province, Antofagasta Region, Chile (Locality at mindat.org) Size: 5.0 x 4.5 x 4.0 cm. A VERY RICH and excellent combination specimen of the RARE and an uncommon copper arsenates from the El Guanaco Mine of Chile. Rare, dark green, microcrystals of lammerite are nicely accented with turquoise-blue sprays of uncommon lamanskiite on a quartz-rich matrix. The El Guanaco Mine is the Type Locality for lemanskiite. Mineral

Lammerite

lammerite

Formula
Cu3(AsO4)2
Lamprophyllite Locality: Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia Original description: A 6.7 by 3.3 cms brown crystal with some dark green Aegirine crystals. JSS specimen and photo. Mineral

Lamprophyllite

lamprophyllite

Formula
(SrNa)Ti2Na3Ti(Si2O7)2O2(OH)2
Lanarkite Locality: Susanna Mine (Glennery Scar Vein; Susanna Vein (Scar Vein); Portobello Vein; Humby Vein; Lead Vein), Leadhills, South Lanarkshire, Strathclyde (Lanarkshire), Scotland, UK (Locality at mindat.org) Size: miniature, 3.3 x 3.2 x 2.2 cm Lanarkite This is a rich specimen for the size with numerous off-white, platy crystals standing up on matrix. Surely there are other species present as well, in this complex assemblage known for its rarities. However, the lanarkite is, unusually, very clear and dominant. Type locality material, now hard to obtain. Ex. John White Collection. Mineral

Lanarkite

lanarkite

Formula
Pb2O(SO4)
Mineral

Landauite

landauite

Formula
NaMnZn2(Ti,Fe)6Ti12O38
Landesite Locality: Berry-Havey Quarry, Poland, Androscoggin Co., Maine (Locality at mindat.org) This extremely rare and important little crystal is approx 3mm in size. It was a gift from Harvard to the AMNH in the mid-1900s (label included) and one should be able to reasonably suppose that, since the type material was residing at Harvard, this crystal comes from the type material or at least the same pocket - or why bother to give it as a carefully catalogued gift to their colleague? Ex AMNH exchanged into the collection of dealer/collector Lawrence Conklin. 0.3 x 0.25 x 0.25 cm Mineral

Landesite

landesite

Formula
Mn²⁺3-xFe³⁺x(PO4)2(OH)x * (3-x)H2O
Langbeinite (Dimensions: 4" x 2.5" x 2.5" ) Locality: Carlsbad Potash District, Eddy and Lea Counties, New Mexico, USA Loaf of salmon colored langbeinite. Mineral

Langbeinite

langbeinite

Formula
K2Mg2(SO4)3
Colour photograph of the langhofite type specimen, GEO-NRM #20030044. Field of view is ca. 1.2 cm × 0.8 cm. The image is published in an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/). Mineral

Langhofite

langhofite
Mineral

Langisite

langisite

Formula
(Co,Ni)As
Langite (image width: 5 mm) Locality: mining waste tip of Richtarova near Stare Hory, Špania Dolina, 10 km northwords of Banská Bystrica, Slovakia Mineral

Langite

langite

Formula
Cu4SO4(OH)6·2H2O
Colorless crystals of the extremely rare thallium mineral lanmuchangite from the second known locality for the mineral, the famous thallium deposit of Allchar (Crven Dol Mine, Allchar, Roszdan, Macedonia), associated to red realgar. Lanmuchangite is a thallium aluminium sulphate. PXRD and EDS analyzed. Mineral

Lanmuchangite

lanmuchangite

Formula
Tl+Al(SO4)2 * 12H2O
White and colorless microcrystals of the rare mineral lannonite from the Anna Mine (Alsdorf, Cologne, North Rhine - Westphalia, Germany). Mineral

Lannonite

lannonite

Formula
Mg2Ca4Al4(SO4)8F8·24H2O
White crystal aggregates of the rare Mg carbonate mineral lansfordite from a locality in Switzerland (Findel Glacier, Zermatt, Zermatt - Saas Fee Area, Valais, Switzerland). Ex. Erich Laskowski collection (USA). Mineral

Lansfordite

lansfordite

Formula
MgCO3·5H2O
Lanthanite-(Ce) Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada FOV 3.4 x 2.3 mm. Via Jean-Pierre Beckerich. MOB coll. Moderate REE absorption lines. Mineral

Lanthanite-(Ce)

lanthanite-(Ce)

Formula
Ce2(CO3)3(H2O)6·2H2O
Colour
colorlessness, pink
Outstanding white tabular crystals of the rare REE mineral lanthanite-(La) from the famous Bastnas deposit in Sweden (Bastnäs Mines, Riddarhyttan, Skinnskatteberg, Västmanland County, Sweden). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Lanthanite-(La)

lanthanite-(La)

Formula
La2(CO3)3(H2O)6·2H2O
Image of Lanthanite-(Nd) from Mitsukoshi, Hizen-cho, Karatsu City, Saga Prefecture, Japan. Donated to the RRUFF Project Database by Marcus Origlieri. Mineral

Lanthanite-(Nd)

lanthanite-(Nd)

Formula
Nd2(CO3)3(H2O)6·2H2O
Mineral

Lapeyreite

lapeyreite

Formula
Cu3O[AsO3(OH)]2·H2O
Outstanding yellow crystals of laphamite associated to white crystal aggregates of the also very rare K silicofluoride mineral hieratite. From: Shamokin, Northumberland County, Pennsylvania, United States of America. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Laphamite

laphamite

Formula
As2(Se,S)3
Mohs
1.5
Colour
dark red
Microscopic black grains of lapieite (a very rare Ni-Cu-Sb sulphide) forming inclusions in massive sulphides in mariposite-rich metamorphic rock from the type locality in Lapie river (Lapie River, St Cyr Range, Watson Lake, Yukon, Canada), in a sample that has three sides polished because it was analyzed by the former owner of the specimen, the Vandenbroucke Museum. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Lapieite

lapieite

Formula
CuNiSbS3
Greyish-white crystals of the very rare mineral laplandite-(Ce) from the type locality (Yubileinaya Pegmatite, Lovozero Massif, Kola, Russian Federation) and only one of the two known localities worldwide. Associated minerals are zorite, terskite and eudialyte. Ex. F.Bauer collection. Mineral

Laplandite-(Ce)

laplandite-(Ce)

Formula
Na4CeTiPO4Si7O18 * 5H2O
Mineral

Laptevite-(Ce)

laptevite-(Ce)

Formula
NaFe²⁺(REE7Ca5Y3)(SiO4)4(Si3B2PO18)(BO3)F11
Locality: Larderello, Pomarance, Pisa Province, Tuscany, Italy Dimensions: 6.1 cm x 3.7 cm x 2.2 cm An incredibly rare specimen of the borate larderellite from the type locality in Italy, Larderello in Tuscany which dates back to 1854 according to the label (it was described in Dana 5th ed. as bechilite in 1868). Larderellite is only found in two localities in the world, both in Italy, and is nearly impossible to find on the market today. The larderellites are the small white translucent crystals. This is the only piece of this material we've had and it comes with a classic label from Josef Vajdák/Pequa Rare Minerals. Mineral

Larderellite

larderellite

Formula
NH4B5O7(OH)2·H2O
Yellow crystals of the very rare Se-U mineral larisaite associated to metallic acicular native selenium crystals, on a contrasting matrix. From: Repete Mine, Blanding, San Juan County, Utah, United States of America. Mineral

Larisaite

larisaite

Formula
Na(H3O)(UO2)3(SeO3)O2 * 4H2O
Mohs
1
Back-scattered electron (BSE) images of nataliakulikite in larnite-gehlenite rock (holotype sample, W11-3) from Nahal Morag Canyon, Hatrurim Basin, Israel. Ntk—nataliakulikite; Prv—Fe-rich perovskite; Mgf—magnesioferrite; Lar—larnite; Flm—flamite; Gh—gehlenite; Ap—fluorapatite; CAS—hydrated Ca-silicates. Mineral

Larnite

larnite

Formula
Ca2SiO4
Mohs
6