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Minerals

6323 results

Pyrostilpnite Locality: St Andreasberg, St Andreasberg District, Harz Mts, Lower Saxony, Germany (Locality at mindat.org) Picture width 2.5 mm. Collection and photograph Christian Rewitzer Mineral

Pyrostilpnite

pyrostilpnite

Formula
Ag3SbS3
Orange brown crystal group of the very rare silicate mineral pyroxferroite from a little known locality in Japan (Isanago Mine, Ohro Kyotango City, Kyoto Prefecture, Honshu Island, Japan). Pyroxferroite has the big singularity of having its type locality in the Moon, exactly in the Sea of Tranquility, where the famous Neil Armstrong landed on July 20, 1969. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Pyroxferroite

pyroxferroite

Formula
(Fe,Mn,Ca)SiO3
Pyroxmangite Locality: Nippyo mine (Yokoneyama), Tochigi Prefecture, Kanto Region, Honshu Island, Japan (Locality at mindat.org) Size: miniature, 4.8 x 3.4 x 3.5 cm Pyroxmangite (!!!) This is an INCREDIBLE, RARE example of old Japanese material from mines that are completely dead and defunct. I have never seen another for this magnitude. It has cherry red crystals, sharp, and freestanding! I do not know HOW old these are, but I am told some date to the late 1800s. I sold this piece back in 1995 , and was happy to get it back recently! I found it in an old collection being dispersed at Tucson of that year, and the label (now lost) indicated it was from the collection of Bill Sanborn. Bill was a well-known San Francisco area mineralogist and curator at the California Academy of Sciences, who specialized in Japanese mineralogy and lived over there for a time. Mineral

Pyroxmangite

pyroxmangite

Formula
MnSiO3
Pyrrhotite, en provenance de Russie, au Muséum de Nantes Mineral

Pyrrhotite

pyrrhotite

Formula
Fe7S8
Mohs
4
Colour
bronze, brown
Pääkkönenite Locality: Kermesite occurrence, Dafeng, Shanglin County, Nanning Prefecture, Guangxi Zhuang Autonomous Region, China (Locality at mindat.org) Grey metallic crystals of Pääkkönenite. Field of view 5 mm. Specimen and photo Leon Hupperichs. Mineral

Pääkkönenite

pääkkönenite

Mohs
2
Mineral

Péligotite

péligotite
Mineral

Písekite-(Y)

písekite-(Y)

Formula
(Y,As,Ca,Fe,U)(Nb,Ti,Ta)O4
Mineral

Příbramite

příbramite

Formula
CuSbSe2
Black metallic microcrystals of the extremely rare Mg-Ti oxide mineral qandilite from the type locality in Iraq (Dupezeh Mountain, Hero, Qala-Diz, Sulaymaniyah Governorate, Iraq) in a whitish contrasting matrix. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Qandilite

qandilite

Formula
(Mg,Fe³⁺)2(Ti,Fe³⁺,Al)O4
Mohs
7
Mineral

Qaqarssukite-(Ce)

qaqarssukite-(Ce)

Formula
BaCe(CO3)2F
Mineral

Qatranaite

qatranaite

Formula
CaZn2(OH)6(H2O)2
Figure 3. (a) BSE image of a qeltite crystal. (b–c) Optical images of the same qeltite crystal showing pleochroism changing from light brown (~ ‖ Z) to dark brown with a red hue (~⊥ Z). Key: Baf – barioferrite; Fap – fluorapatite; Gh – gehlenite; Qlt – qeltite; Rnk – rankinite. The abbreviations are after Warr (Reference Warr2021). 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

Qeltite

qeltite

Formula
Ca3TiSi2(Fe³⁺2Si)O14
White crystals of the very rare Na borate-carbonate mineral qilianshanite from one of only three known localities worldwide (Alkali Lake, Lake County, Oregon, United States of America) and associated to nahcolite. Ex. Erich Laskowski collection (USA). Mineral

Qilianshanite

qilianshanite

Formula
NaH4(CO3)BO3)·2H2O
Qingheiite, Beusite Locality: Santa Ana Pegmatite, Totoral pegmatitic field, Coronel Pringles Department, San Luis, Argentina Field of View: 5 mm Description: Dark green Qingheiite and brown Beusite on matrix; Photo and collection Fernando Brederodes Mineral

Qingheiite

qingheiite

Formula
NaNaMn(MgAl)(PO4)3
The crystal structure of Cadmium telluride, CdTe. The __ purple spheres represent Cadmium cations, Cd+, and the __ green spheres represent telluride anions, Te−. Mineral

Qingsongite

qingsongite

Formula
BN
Mineral

Qitianlingite

qitianlingite

Formula
Fe²⁺2Nb2W⁶⁺O10
Mineral

Qiumingite

qiumingite

Formula
Pb3(Zn2Fe³⁺)Sb⁵⁺P2O14
Two sharp metallic crystals of the extremely rare mineral quadratite from the type and only known locality worldwide (Lengenbach Quarry, Binntal, Wallis, Switzerland). In the main crystal we can see part of the typical octogonal shape of the mineral). The specimen was found in 1998. Quadratite is one the rarest minerals from Lengenbach. Mineral

Quadratite

quadratite

Formula
AgCdAsS3
Mineral

Quadridavyne

quadridavyne

Formula
[(Na,K)6Cl2][Ca2Cl2][(Si6Al6O24)]
Mineral

Quadruphite

quadruphite

Formula
Na6Na2(CaNa)2Na2Ti2Na2Ti2(Si2O7)2(PO4)4O4F2
Quartz, Tibet. Mineral

Quartz

Formula
SiO2
Mohs
7
Colour
Colourless, white, purple, pink, brown, black
Silvery metallic crystals of the rare Pb-Ag sulphosalt mineral quantrandorite (formerly known as andorite-IV) from the type locality in the Alps (Les Cougnasses Mine, Orpierre, Hautes-Alpes, Provence-Alpes-Cote d'Azur, France). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Quatrandorite

quatrandorite

Formula
AgPbSb3S6
Colour
grey
One white crystal group of the rare mineral queitite from the famous Tombstone (Arizona, United States of America). Quietite has only been found in a few localities worldwide. Mineral

Queitite

queitite

Formula
Zn2Pb4(Si2O7)(SiO4)(SO4)
Mohs
4
Quenselite Locality: Långban, Filipstad, Värmland, Sweden (Locality at mindat.org) Picture width 0,5 mm. Collection and photograph Christian Rewitzer Mineral

Quenselite

quenselite

Formula
PbMn³⁺O2(OH)
Mohs
2.5