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Mineralati

Minerals

6323 results

Colorless and beige acicular crystals of the very rare mineral potassic-jeanlouisite (IMA 2018-050) from the type and only known locality worldwide (Zirkel Mesa, Leucite Hills, Sweetwater County, Wyoming, United States of America). Ex. Erich Laskowski collection (USA). Mineral

Potassic-Jeanlouisite

potassic-jeanlouisite

Formula
K(NaCa)(Mg4Ti)Si8O22O2
Mineral

Potassic-Magnesio-Arfvedsonite

potassic-magnesio-arfvedsonite

Formula
[K][Na2][Mg4Fe³⁺]Si8O22(OH)2
Mineral

Potassic-Magnesio-Fluoro-Arfvedsonite

potassic-magnesio-fluoro-arfvedsonite

Formula
KNa2(Mg4Fe³⁺)Si8O22F2
Mohs
6
Mineral

Potassic-Magnesio-Hastingsite

potassic-magnesio-hastingsite

Formula
KCa2(Mg4Fe³⁺)(Si6Al2)O22(OH)2
Colour
black
2.8 x 2.4 x 1.8 cm. Kornite (now potassic-mangani-leakeite) is an extremely rare sodium amphiboles species that is only found in two localities in the world. This piece just happens to be from the type locality for the species, the Wessels Mine in South Africa. This mineral was originially named kornite (for the German geologist Hermann Korn), but was discredited in the 2012 amphibole nomenclature and the mineral renamed potassic-mangani-leakeite. Dark red to brownish "kornite" can be seen associated with dark reddish-black colored prismatic manganvesuvianite on matrix. From the collection of Paolo Matioli. Mineral

Potassic-Mangani-Leakeite

potassic-mangani-leakeite

Formula
KNa2(Mg2Mn³⁺2Li)Si8O22(OH)2
Mineral

Potassic-Pargasite

potassic-pargasite

Formula
KCa2(Mg4Al)(Si6Al2)O22(OH)2
Colour
black
Mineral

Potassic-Richterite

potassic-richterite

Formula
{K}{CaNa}{Mg5}Si8O22(OH)2
Mineral

Potassic-Sadanagaite

potassic-sadanagaite

Formula
KCa2(Mg3Al2)(Si5Al3)O22(OH)2
Mohs
6
Mineral

Potassiccarpholite

potassiccarpholite

Formula
(K,☐)(Li,Mn²⁺)2Al4(Si2O6)2(OH,F)8
Mineral

Potassicmendeleevite-(Ce)

potassicmendeleevite-(Ce)

Formula
Cs6K6(REE22Ca6)(Si70O175)(OH,F)20(H2O)15
Pottsite Locality: Linka Mine (Garnetite mine), Spencer Hot Springs District, Lander County, Nevada, USA (Locality at mindat.org) Size: 4.6 x 3.8 x 1.6 cm. This is a very rare hydrated lead, bismuth vanadate found in an oxide zone of a tungsten mine. This is the best and type locality for the species. The bright, mustard yellow microcrystals crystals are emplaced in a wide vein in matrix. Ex. Harold Urish Collection. Mineral

Pottsite

pottsite

Formula
(Pb3xBi4-2x)(VO4)4*H2O (0.8 < x < 1.0)
Mohs
3.5
Black crystals of the extremely rare selenide-telluride mineral poubaite from the type locality and only one of the three known localities worldwide: Oldřichov (Ullersloh), Nejdek (Neudek), Krušné Hor, Bohemia, Czech Republic. Ex.F.Bauer collection. He bought the specimen to H.J.Wilke in the 90's. Mineral

Poubaite

poubaite

Formula
PbBi2(Se,Te,S)4
Poudretteite Locality: Mogok Township, Pyin-Oo-Lwin District, Mandalay Division, Burma (Myanmar) Size: 0.9 cm x 0.6 cm x 0.5 cm An exquisite gem crystal of an extreme rarity. Formerly known only from micros from Poudrette Quarry in Canada, a few small pockets of this material have now turned up in the Mogok Gem Tract. This is an extraordinary crystal for its form, good termination, and lavender color. In person, it is more gemmy. Joe Budd photos. Mineral

Poudretteite

poudretteite

Formula
KNa2B3Si12O30
Mohs
5
Poughite Locality: Moctezuma Mine (Bambolla Mine), Moctezuma, Municipio de Moctezuma, Sonora, Mexico (Locality at mindat.org) Yellow-brown poughite on quartz. Picture width 3 mm. Collection and photograph Christian Rewitzer This Photo was Mindat.org Photo of the Day - 13th Sep 2007 Mineral

Poughite

poughite

Formula
Fe³⁺2(TeO3)2(SO4)(H2O)2 * H2O
:6.2 x 4.4 x 3.2 cm. Discovered in 1979, povondraite is a relatively new member of the Tourmaline Group. The crystals here are black, lustrous, and 1-2 mm in size. They richly cover one side of the matrix, and the povondraite winds its way through the fissures in the rock. The host rock, by the way, is the very unusual Locotal Breccia, a metamorphosed evaporite deposit. A fine example of this new species, and even better in person, with the luster really shines. Originally acquired from Alfredo Petrov and John Attard. Alfredo brought them out of Bolivia at the time, directly. Ex. Hoppel Collection. From: Alto Chapare mining district, Chapare Province, Cochabamba, Bolivia Mineral

Povondraite

povondraite

Formula
NaFe³⁺3(Mg2Fe³⁺4)(Si6O18)(BO3)3(OH)3O
Mohs
7
Powellite Locality: Jalgaon District, Maharashtra, India (Locality at mindat.org) An absolutely extraordinary powellite specimen – a complete, undamaged, huge floater crystal, with superb luster and sharpness, and with wonderfully multi-peaked terminations on both ends One one side, it has grown around a slender stilbite crystal, which served as a sort of natural base to let this amazing creature grow. This is something you just do not see around – I grabbed it immediately at first sight at the Denver show! 4.7 x 3.4 x 2.8 cm Mineral

Powellite

powellite

Formula
CaMoO4
Hundreds of brown microcrystal aggregates of the extremely rare Hg mineral poyarkovite from Chihuahua, Mexico, on a pale matrix. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Poyarkovite

poyarkovite

Formula
Hg3OCl
Mineral

Pošepnýite

pošepnýite
Colourless thin tabular hexagonal crystal of prachařite associated with white sprays of indistinct acicular pharmacolite crystals. Area on co-type specimen NHMW-MIN-O357. White-light photomicrograph Harald Schillhammer Mineral

Prachařite

prachařite
Mineral

Pradetite

pradetite

Formula
CoCu4(AsO4)2(AsO3OH)2·9H2O
Mineral

Pratesiite

pratesiite

Formula
AgCuTe2
Mohs
3
Colour
black
Prehnite (4.0 × 3.5 × 2.0 cm) from Southbury, Connecticut, USA Mineral

Prehnite

prehnite
Picture width 2.0 mm. Collection and photograph Christian Rewitzer. From: Nuestra Señora de las Alcantarillas mine, Belalcázar, Córdoba, Andalusia, Spain. Mineral

Preisingerite

preisingerite

Formula
Bi3(AsO4)2O(OH)
Very pale blue crystals of the rare mineral preiswerkite from the type locality: Geisspfad, Binn, Goms, Valais, Switzerland. Mineral

Preiswerkite

preiswerkite

Formula
NaMg2Al(Al2Si2O10)(OH)2