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Minerals

6323 results

Mineral

Diversilite-(Ce)

diversilite-(Ce)

Formula
Na2(Ba,K)6Fe²⁺Ce2Ti3(Si3O9)3(HSiO4)3(OH,H2O)9
Dixenite is an extremely rare mineral known from only one locality worldwide, the famous Langban deposit in Sweden. The mineral is present in this specimen as dark red crystals associated to pyroaurite. This sample probably originates from the 1922 find (Irland working, 165m level) when dixenite was found associated to pyroaurite. Only two more dixenite occurrences are described in the literature, one from 1920 (the discovery) and later in 1924, so it is a real rarity! (Langban 1999 monography book, by D. Holtstam and J. Langhof) Mineral

Dixenite

dixenite

Formula
CuMn²⁺14Fe²⁺(SiO4)2(As5+O4)(As³⁺O3)5(OH)6
Bronze colored microcrystals of the very rare mineral djerfischerite from this famous Russian locality: Rasvumtchorr, Khibiny, Kola, Russian Federation. It is one of the very few sulphides containing potassium. Djerfisherite in appreciable crystals is very rare. Mineral

Djerfisherite

djerfisherite

Formula
K6(Fe,Cu,Ni)25S26Cl
Djurleite pseudomorph after pyrite from Santa Rita, Grant County, New Mexico. Specimen size 2.4 cm. Mineral

Djurleite

djurleite

Formula
Cu31S16
Mineral

Dmisokolovite

dmisokolovite

Formula
K3Cu5AlO2(AsO4)4
Mineral

Dmisteinbergite

dmisteinbergite

Formula
Ca(Al2Si2O8)
Mineral

Dmitrievite

dmitrievite

Formula
Sb4Cl2O5
Mineral

Dmitryivanovite

dmitryivanovite

Formula
CaAl2O4
Mineral

Dmitryvarlamovite

dmitryvarlamovite

Formula
Ti2(Fe³⁺Nb)O8
Mineral

Dobrovolskyite

dobrovolskyite

Formula
Na4Ca(SO4)3
Dobšináite Field of View: 4.6 mm Locality: Dionýz mine, Zemberg-Terézia vein system, Dobšiná mining district, Dobšiná, Rožňava District, Košice Region, Slovakia Description: Light pink crystalline aggregate of dobšináite associated with pink spherical aggregates of erythrite and minor thin needles of phaunouxite. All minerals were confirmed by PXRD and EMPA-WDS. Self collected. Photographed by Luboš Hrdlovič. Martin Števko collection. Ref.: Sejkora J., Števko M., Škoda R., Víšková E., Toman J., Hreus S., Plášil J., Dolníček Z. (2021): Dobšináite, Ca2Ca(AsO4)2·2H2O, a new member of the roselite group from Dobšiná (Slovak Republic). In: Journal of Geoscineces, 66, 2, 127-135 DOI:10.3190/jgeosci.324. Mineral

Dobšináite

dobšináite

Formula
Ca2Ca(AsO4)2·2H2O
Mineral

Dokuchaevite

dokuchaevite

Formula
Cu8O2(VO4)3Cl3
Mineral

Dolerophanite

dolerophanite

Formula
Cu2O(SO4)
Mohs
3
Brown crystal aggregates of dollaseite-(Ce) from the type locality in Sweden (Östanmossa Mine, Norberg, Västmanland County). Mineral

Dollaseite-(Ce)

dollaseite-(Ce)

Formula
{CaCe}{MgAlMg}(Si2O7)(SiO4)(OH)F
Dolomite and Talc Locality : Trimouns Talc Mine, Luzenac, Ariège, Midi-Pyrénées, France Size 10x6.2cm Mineral

Dolomite

dolomite

Formula
CaMg(CO3)2
Very dark green crystal frgament of the rare vanadium mineral doloresite from Monument #2 Mine, Yazzie Mesa, Apache County, Arizona, United States of America. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Doloresite

doloresite

Formula
V⁴⁺3O4(OH)4
Mineral

Domerockite

domerockite

Formula
Cu4(AsO4)(AsO3OH)(OH)3·H2O
Domeykite, Copper, Quartz Locality: Mohawk Mine, Mohawk, Keweenaw County, Michigan, USA (Locality at mindat.org) A classic, sliced ore specimen of a vein of massive, brass-colored domeykite in quartz with copper. Domeykite is a copper arsenide and this is a fine, rich representative piece from the famous Mohawk Mine of Michigan. Ex Richard Hauck Collection. This small cabinet weighs over 1 and 1/2 pounds or 688 grams! 6.7 x 6.4 x 4.0 cm Mineral

Domeykite

domeykite

Formula
Cu3As
Mineral

Domitrovicite

domitrovicite

Formula
Zn(C2H3O3)2·2H2O
Outstanding yellow crystals of the very rare mineral donbassite from the type locality in Donbass (Donetsk) in a contrasting dark matrix. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Donbassite

donbassite

Formula
Al4.33(AlSi3O10)(OH)8
Yellowish pale brown globular aggregates of the extremely rare Ca-Fe phosphate mineral dondoellite (IMA 2021-048) from the type and only known locality in Yukon, Canada (Grizzly Bear Creek, Stoneman Camp, Rapid Creek, Yukon, Canada). Dondoellite was named after Don Doell Sr. (b. 29 January 1948, Rochester, New York, USA) and Don Doell Jr. (b. 20 July 1982, Montreal, Quebec, Canada), Canadian mineral collectors who provided the first specimens for analysis. Ex-Alfredo Petrov specimen. Mineral

Dondoellite

dondoellite

Formula
Ca2Fe(PO4)2·2H2O
Spherical radial aggregates of dongchuanite (Dc) associated with hemimorphite (Hmp) and quartz (Qz) (#M26148, holotype DC-1). 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

Dongchuanite

dongchuanite

Formula
Pb4ZnZn2(PO4)4(OH)2
Metallic crystals of the extremely rare Ni-Hg sulphide mineral donharrisite from a locality in Spain: El Entredicho, Almadenejos, Ciudad Real, Castilla La Mancha, Spain. See the article about the locality and the find including analysis in Paragenesis 2024-2 : "La corta El Entredicho , Almadenejos, Ciudad Real, Castilla-La Mancha, Spain"., p.3-40 by Borja Sainz de Baranda, Cesar Menor Salvan, Antonino Bueno Yanes. Mineral

Donharrisite

donharrisite

Formula
Ni3HgS3
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 ~ 2 cm. Individual xls ~ 3-4 mm diameter. Via Jean-Yves Lamoureux (found Jan 1988 - at minus 28ºC!). MOB coll. This is classic MSH donnayite-(Y). I don't know if it is from an analyzed find so strictly speaking it is "donnayite group". But here is JY's description of the find: "The famous donnayite pocket opened at the end of 1987. We worked that pocket on January 17, 24, and 31st ,1988, under extreme conditions : minus 28 degrees Celsius on the 24th ! Wine froze in a bottle we had brought... We got out of the pocket soaked to the bones as water continually trickled inside. We were... younger, then! :)" Mineral

Donnayite-(Y)

donnayite-(Y)

Formula
NaSr3CaY(CO3)6·3H2O