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Minerals

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Polylithionite, Sérandite Locality: Québec, Canada (Locality at mindat.org) A sharp miniature with a 3 cm poly rosette perched delicately atop a sheaf of parallel serandite crystals. One of the nicest minis in the lot I saw, from the new finds of early this summer. 4 x 4 x 3 cm Mineral

Polylithionite

polylithionite

Formula
KLi2AlSi4O10F2
Mineral

Polyphite

polyphite

Formula
Na6(Na4Ca2)2Na2Ti2Na2Ti2(Si2O7)2(PO4)6O4F4
Mineral

Pomite

pomite
Red-brown microcrystals of ponomarevite, an extremely rare K-Cu chloride from the famous Tolbachik volcano (Tolbachik Volcano, Kamchatka Krai, Russian Federation) the only known locality and associated to green crystals of klyuchevskite. The ponomarevite crystals are difficult to see in the photo. The sample is stored in a closed vial to avoid decomposition in the air atmosphere. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Ponomarevite

ponomarevite

Formula
K4Cu4Cl10O
Mineral

Popovite

popovite

Formula
Cu5O2(AsO4)2
Mineral

Poppiite

poppiite

Formula
Ca2V³⁺V³⁺2(Si2O7)(SiO4)(OH,O)2·H2O
Mineral

Popugaevaite

popugaevaite
Portlandite crystals from Eifel, Bellerberg, Germany. FOV 1mm. Mineral

Portlandite

portlandite

Formula
Ca(OH)2
Mohs
2
Posnjakite Locality: Špania Dolina (Urvölgy; Herrengrund), Špania Dolina ore belt, Starohorské Mts, Banská Bystrica Region, Slovakia (Locality at mindat.org) Field of view 5 mm. Specimen and photo Leon Hupperichs. Mineral

Posnjakite

posnjakite

Formula
Cu4SO4(OH)6·H2O
Mineral

Postite

postite

Formula
Mg(H2O)6Al2(OH)2(H2O)8(V10O28)·13H2O
Potarite Locality: Kaietur Falls, Potaro River, Kangaruma District, Potaro-Siparuni Region, Guyana (Locality at mindat.org) 2 mm (each nugget). Potarite is extremely rare in nature - it is a Palladium Mercury amalgam. These 3 dark nuggets in a capsule may not seem too impressive, but the material is very rare and this has been validated by microprobe with Bart Cannon. This is from the original locality, from Dr. Richard Gaines' Collection. 3 specimens of nuggets to nearly 2mm each. From the type locality. Ex. Dr. Mark Feinglos Collection. Mineral

Potarite

potarite

Formula
PdHg
Mineral

Potassic-Arfvedsonite

potassic-arfvedsonite

Formula
KNa2(Fe²⁺4Fe³⁺)Si8O22(OH)2
Colour
black
Mineral

Potassic-Chloro-Hastingsite

potassic-chloro-hastingsite

Formula
KCa2(Fe²⁺4Fe³⁺)(Si6Al2)O22Cl2
Mohs
5
Mineral

Potassic-Chloro-Pargasite

potassic-chloro-pargasite

Formula
KCa2(Mg4Al)(Si6Al2)O22Cl2
Colour
black
Mineral

Potassic-Ferri-Leakeite

potassic-ferri-leakeite

Formula
KNa2(Mg2Fe³⁺2Li)Si8O22(OH)2
Mohs
5
Colour
brown
Mineral

Potassic-Ferro-Ferri-Sadanagaite

potassic-ferro-ferri-sadanagaite

Formula
KCa2Fe²⁺3Fe³⁺2(Si5Al3)O22(OH)2
Mohs
5.8
Colour
black
Black crystals of the rare amphibole mineral potassic-ferro-ferri-taramite in a whitish contrasting matrix from the TL in Somalialand (Mohlileh Hill, Darkainle Complex,Borama District, Awdal, Somaliland). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Potassic-Ferro-Ferri-Taramite

potassic-ferro-ferri-taramite

Formula
K(NaCa)(Fe²⁺3Fe³⁺2)(Si6Al2)O22(OH)2
Mineral

Potassic-Ferro-Pargasite

potassic-ferro-pargasite

Formula
KCa2(Fe²⁺4Al)(Si6Al2)O22(OH)2
Mohs
6
Colour
black
Mineral

Potassic-Ferro-Sadanagaite

potassic-ferro-sadanagaite

Formula
KCa2(Fe²⁺3Al2)(Si5Al3)O22(OH)2
Mohs
6
Mineral

Potassic-Ferro-Taramite

potassic-ferro-taramite

Formula
K(NaCa)(Fe²⁺3Al2)(Si6Al2)O22(OH)2
A large (for the species) cleavage / crystal fragment, acquired from A. Petrov at the 2015 Liège show. Collection and photo Erik Vercammen. Locality: Greenwood mine, Town of Tuxedo, Orange Co., New York, USA. Mineral

Potassic-Fluoro-Hastingsite

potassic-fluoro-hastingsite

Formula
KCa2(Fe²⁺4Fe³⁺)(Si6Al2)O22F2
Mohs
6
Mineral

Potassic-Fluoro-Pargasite

potassic-fluoro-pargasite

Formula
KCa2(Mg4Al)(Si6Al2)O22F2
Colour
black
Mineral

Potassic-Fluoro-Richterite

potassic-fluoro-richterite

Formula
K(NaCa)Mg5Si8O22F2
Colour
grey
The sample is a rock fragment (7 cm × 4 cm × 3 cm), composed mainly of intergrowths and radial-radiant aggregates of dark green, almost black potassic-hastingsite, brown-orange garnet, purple vesuvianite, and small amounts of calcite, quartz, and sulfides. Apatite and zircon were identified as accessory minerals. Zoisite and epidote are found as single grains. Minerals are unevenly distributed. The structure is coarse-grained. From the Kedrovy District (East Siberia, Russia). The image is published in an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Mineral

Potassic-Hastingsite

potassic-hastingsite