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Minerals

6323 results

Mineral

Pilawite-(Y)

pilawite-(Y)

Formula
Ca2Y2Al4(SiO4)4O2(OH)2
Mineral

Pilipenkoite

pilipenkoite
Pillaite is a very rare mineral known from only one locality worldwide, the famous Buca della Vena mine in Italy, which is of course the type locality. It occurs as outstanding acicular metallic crystals in a white contrasting dolomitic limestone matrix. Mineral

Pillaite

pillaite

Formula
Pb9Sb10S23ClO0.5
Black microcrystals of the very rare bismuth telluride mineral pilsenite on a contrasting matrix. From: White Elephant Mine, Vernon, British Columbia, Canada. Mineral

Pilsenite

pilsenite

Formula
Bi4Te3
Pimelite from Szklary, Lower Silesia, Poland. Specimen size 2.3 cm Mineral

Pimelite

pimelite
Pinakiolite Locality: Långban, Filipstad, Värmland, Sweden (Locality at mindat.org) Size: 6.7 x 5.4 x 3.4 cm. Pinakiolite is a very rare magnesium, manganese borate, unique in the world to the Langban deposit in Sweden. This is a fine, very rich specimen of large, lustrous, deep reddish-black laths to 1.2 cm concentrated in parallel-growth on the front of the specimen. Pinakiolite grains are richly peppered on both the front and back of the piece. Ex. Mullane Collection. Mineral

Pinakiolite

pinakiolite

Formula
(Mg,Mn)2(Mn³⁺,Sb⁵⁺)O2(BO3)
Mohs
6
Colour
black
Mineral

Pinalite

pinalite

Formula
Pb3(WO4)OCl2
Very small (a little less than 1 mm) black single crystal of the extremely rare Hg mineral pinchite from the type and only known locality worldwide, the Terlingua Mining District in Texas. Pinchite is probably the rarest of all Hg minerals! This specimen is a part of the holotype studied for the description of the mineral species in 1974. This sample was provided by the famous systematic mineral collector Bill Pinch, who had it named in his honour. It includes a copy of the original label from the Pinch collection (see photo attached) where it states that it is part of the holotype used for the description. This copy of the label will be sent to the buyer of the specimen. This sample was later also in the Guy Story Brown Hg collection, famous mineral collector known for his very extensive collection of mercury minerals. Mineral

Pinchite

pinchite

Formula
Hg5O4Cl2
Mineral

Pingguite

pingguite

Formula
Bi6Te4+2O13
Pinnoite Locality: Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Oblysy (Atyrau Oblast'), Kazakhstan (Locality at mindat.org) Size: 8 x 6 x 4 cm. A very rich and beautiful specimen of this rare species from the famous borate deposits at Lake Inder. Glistening, translucent aggregates to just under 1 cm abound on this 3-dimensional matrix. Ex. Martin Zinn Collection. Mineral

Pinnoite

pinnoite

Formula
MgB2O(OH)6
Dark green crystals of the very rare mineral fernandinite associated to yellow crystals of the also rare pintadoite. Both are vanadium minerals and have only been found in a few localities worldwide. From: Slick Rock District, San Miguel County, Colorado, United States of America. Mineral

Pintadoite

pintadoite

Formula
Ca2(V2O7)·9H2O
Mineral

Piretite

piretite

Formula
Ca(UO2)3(SeO3)2(OH)4·4H2O
Pirquitasite, Toyohaite Locality: Pirquitas Ag-Sn Deposit, Rinconada Department, Jujuy, Argentina (Locality at mindat.org) Size: small cabinet, 9.7 x 8.0 x 5.8 cm Toyohaite with Pirquitasite ex. Dr. Werner Paar Collection TOYOHAITE, in xls (!!) is super-rare. This specimen features multiple EYE-VISIBLE crystals to about 1mm, clearly contrasted upon the sparkling sulfide matrix. It is richly impressive. This is the richest specimen available for sale from his supply, according to Dr. Paar. This specimen has a small zone of analysed Pirquitasite - see arrow (this is obviously the type locality). They are not readily eye-visible in these photos, but there are many seen with a loupe and in person looking into the cavity (hence the price). It has a display quality, that is nice. All crystals are nicely protected in a shallow cavity, as well. This is the Ag-rich end member of the rhodostannite-toyohaite solid solution series. A very rare mineral originally described from the Toyoha mine in Japan where it occurred in microscopic grains only. For the first time, the new occurrence in Argentina provides large xls of this species (+/- 1 mm) grown on franckeite-potosiite, and associated with other rare minerals like pirquitasite, cylindrite and fizelyite-ramdohrite. The mineral has a "pseudo-cubic" shape and looks like pyrrhotite. Only very few specimens with xls were recovered, and chances to find additional material are almost none. A "must" for any collector of rare Ag minerals. The mineral was microprobed and almost exaxctly correponds to the end member composition Mineral

Pirquitasite

pirquitasite

Formula
Ag2ZnSnS4
Outstanding perfect single crystal of the rare carbonate mineral pirssonite from the type locality: Searles Lake, San Bernardino County, California, United States of America. Mineral

Pirssonite

pirssonite

Formula
Na2Ca(CO3)2·2H2O
Pitiglianoite is a extremely rare mineral only known worlwide from three localities in Latium and Tuscany. It occurs in this specimen as sharp colorless crystals associated to minoritary afghanite. From: Grosseto, Tuscany, Italy. Mineral

Pitiglianoite

pitiglianoite

Formula
Na6K2(Al6Si6O24)(SO4)·2H2O
Pitticite, 30 mm, Agdara field, Ordubad region, Azerbaijan Mineral

Pitticite

pitticite

Formula
[Fe,AsO4,SO4,H2O] (?)
Mineral

Pittongite

pittongite

Formula
(Na,H2O)0.7(W,Fe³⁺)(O,OH)3
Piypite Locality: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia Green acicular xls of Piypite [possibly klyuchevskite, see http://www.mindat.org/mesg-7-70656.html], specimen is sealed in a plasticbox. Field of view 5 mm. Depth of field is achieved with CombineZM. Specimen and photo Leon Hupperichs. Mineral

Piypite

piypite

Formula
K4Cu4O2(SO4)4·(Na,Cu)Cl
Mohs
2.5
Black prismatic crystals on the very rare sulphosalt mineral pizgrischite from the TL in Piz Grisch, Switzerland (Piz Grisch, Ausserferrera, Viamala Region, Grisons, Switzerland). Ex. Erich Laskowski collection (USA). Mineral

Pizgrischite

pizgrischite

Formula
(Cu,Fe)Cu14PbBi17S34
Plagionite Locality: San José Mine, Oruro City, Cercado Province, Oruro Department, Bolivia (Locality at mindat.org) Size: 3.3 x 3.0 x 1.7 cm. Plagionite is a rare lead-antimony-sulfide. This incredibly rich specimen is relatively large and of high quality for this famous old find....probably dating back over 50 years to the Mark Bandy era in Bolivia. It features sharp metallic crystals to 9mm in size, in an interconnected cluster. For crystal size, and robustness, and overall richness of the piece, this is one of the better surviving examples, I think we could say. Ex. Lawrence Conklin Collection. Mineral

Plagionite

plagionite

Formula
Pb5Sb8S17
Mohs
2.5
Plancheite Locality: Kambove, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) (Locality at mindat.org) Size: 10.9 x 7.2 x 6.9 cm. An exceptionally large and rich specimen of solid plancheite forming veins and large globular clusters. Old material from this well-known locality. Ex. Marvin Rausch Collection. Mineral

Plancheite

plancheite

Formula
Cu8(Si8O22)(OH)4·H2O
Planerite Locality: Mt Ida, Montgomery County, Arkansas, USA (Locality at mindat.org) Size: miniature, 3.6 x 2.4 x 2.3 cm Planerite Superb locality specimen of the aluminum phosphate, planerite: rare for the locality and just a pretty miniature that would stand out in any group of Arkansas minerals, few of which have any color like this to them. Mineral

Planerite

planerite

Formula
Al6(PO4)2(PO3OH)2(OH)8·4H2O
Mohs
5
A selection of backscatter electron (BSE) images of platinum-group minerals (PGMs) forming polymineralic aggregates. Two-phase PGMs composed of (a) Sperrylite (Sp; PtAs2) and irarsite (Ira; (Ir,Ru,Rh,Pt)AsS); (b) Pt-rich irarsite (Ira-Pt) and Ru-rich irarsite (Ira-Ru); (c) Rutheniridosmine (Rut; (Ir,Os,Ru)) and erlichmanite (Erl; OsS2); (d) Rutheniridosmine and platarsite (Plt; (Pt,Rh,Ru)AsS); (e) Platarsite and sperrylite; and (f) A three-phase PGM composed of sperrylite, platarsite and hollingworthite (Ho; (Rh,Pt,Pd)AsS). The image is published in an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. Mineral

Platarsite

platarsite

Formula
PtAsS
Colour
grey
Platinum Locality: Australia Size: thumbnail, 1.5 x 1.1 x 0.5 cm Platinum This is a lustrous, waterworn, metallic gray, platinum nugget. It is obviously from an alluvial deposit, and is a very attractive nugget with good heft for the size (7 grams). Platinum is over $1000 per ounce so this is worth $250 or so just in melting weight. ex. Cranbrook Museum with label Mineral

Platinum (Native)

platinum (native)

Formula
Pt