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Minerals

6323 results

Mineral

Greenwoodite

greenwoodite

Formula
Ba2-ₓ(V³⁺OH)ₓV³⁺9(Fe³⁺,Fe²⁺)2Si2O22
Rounded crystals of gregoryite in a natrocarbonatite from Ol Doinyo Lengai, Tanzania, Africa. Crossed nicols image, magnification 10x (Field of view = 2mm) Mineral

Gregoryite

gregoryite

Formula
Na2(CO3)
Mohs
3
Greifensteinite (Picture size: 3 mm) Locality: Greifensteine, Ehrenfriedersdorf, Ore mountains, Saxony, Deutschland Mineral

Greifensteinite

greifensteinite

Mohs
4.5
Mineral

Greigite

greigite

Formula
Fe²⁺Fe³⁺2S4
Mineral

Grenmarite

grenmarite

Formula
Na2Zr2Na2MnZr(Si2O7)2O2F2
Mineral

Grguricite

grguricite
White crystal of the very rare mineral griceite (LiF) from the type locality in the famous Mont Saint Hilaire quarries (Mont Saint-Hilaire, Montérégie, Québec, Canada). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Griceite

griceite

Formula
LiF
SEM back-scatter electron images showing type griffinite (Al2TiO5). (a) Griffinite in corundum grain 198c from Mount Carmel mount Corundum-18-1. (b) A close-up of griffinite with rutile. The green rectangle in panel (a) indicates the region enlarged in panel (b). The image is published in an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Mineral

Griffinite

griffinite

Formula
Al2TiO5
Mineral

Grigorievite

grigorievite

Formula
Cu3Fe³⁺2Al2(VO4)6
An extremely rare black grain of an intergrown mixture of grimaldiite and mcconnellite from the type locality for both species: Merume River, Kamakusa, Potaro-Siparuni Region, Guyana. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Grimaldiite

grimaldiite

Formula
CrO(OH)
Mineral assemblage and textural features of the studied grimmite-bearing sample on BSE images. Skutterudite (Sku) cut by a grimmite (Gr) veinlet containing abundant xenomorphic inclusions of jaipurite (J). 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

Grimmite

grimmite
Botryoidal Čejkaite with prismatic Grimselite (specimen width 4.7cm) Locality: Rovnost Mine (Werner Mine), Jáchymov (St Joachimsthal), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic Mineral

Grimselite

grimselite

Formula
K3Na(UO2)(CO3)3·H2O
Griphite (Size: 7.5 x 6.4 x 3.8 cm) Locality: Everly Mine (Riverton lode), Harney City, Pennington County, South Dakota, USA Griphite is a very rare lithium phosphate found at only three localities worldwide, according to MINDAT. This waxy lustre, dark brown to gray piece is nearly solid griphite and is from the Type Locality - the Everly Mine of South Dakota. Older and seldom available material from the Dennis Mullane Collection. Certainly not pretty to look at, but still it’s a very rich and highly representative example of the rare species. Mineral

Griphite

griphite

Formula
Na4Li2Ca6(Mn²⁺,Fe²⁺,Mg)19Al8(PO4)24(F,OH)8
Well formed orange brown grischunite crystals associated to almost white tilasite crystals. Grischunite has only been found in this locality worldwide, so it's a real rarity. From: Falotta, Tinzen, Grischun, Switzerland. Mineral

Grischunite

grischunite

Formula
NaCa2Mn²⁺5Fe³⁺(AsO4)6·2H2O
Mineral

Gritsenkoite

gritsenkoite

Formula
CoMg2(AsO4)2(H2O)8
Mineral

Groatite

groatite

Formula
☐NaCaMn2(PO4)(HPO4)2
Uakitite in troilite–daubréelite ± schreibersite globules in Fe-Ni-metal (kamacite), Uakit meteorite (IIAB), BSE images. Symbols: VN-1–VN-4—uakitite; Dbr—daubréelite; Tro—troilite; Sch—schreibersite; Mgt—magnetite; Kmc—kamacite, Pn—pentlandite; Hz—heazlewoodite; Gro—grokhovkyite CuCrS2. Mineral

Grokhovskyite

grokhovskyite
Mineral

Grootfonteinite

grootfonteinite

Formula
Pb3O(CO3)2
Images a the rock fragment from Mt Carmel. Back-scattered electron (BSE) image of the hibonite–grossite–spinel aggregate studied. 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

Grossite

grossite

Formula
CaAl4O7
Mineral

Grossmanite

grossmanite

Formula
Ca(Ti³⁺,Mg,Ti⁴⁺)AlSiO6
Grossular Locality: Jeffrey mine (Jeffrey quarry; Johns-Manville mine), Asbestos, Les Sources RCM, Estrie, Québec, Canada (Locality at mindat.org) These already-rare bright green Jeffrey Mine grossulars have virtually DISAPPEARED since the closing of the mine. Now and then, you will find a little specimen with tiny crystals, but not sizeable crystals such as this (to .45 mm), with the TOP glowing green color and gemminess! As hard as it is to find one of these now, it will only get harder. Although small as a specimen, this is of truly superior quality! 2.5 x 2.4 x 1.3 cm Mineral

Grossular

grossular

Formula
Ca3Al2(SiO4)3
Groutite Locality: Black Water Mine, Black Mesa Basin, Apache County, Arizona, USA (Locality at mindat.org) Picture width 6 mm. Collection and photograph Christian Rewitzer This Photo was Mindat.org Photo of the Day - 5th Nov 2007 Mineral

Groutite

groutite

Formula
Mn³⁺O(OH)
Tan crystals of the rare silicate mineral grumantite from the type locality and only one of the two known localities worldwide: Lovozero Massif, Kola, Russian Federation. Mineral

Grumantite

grumantite

Formula
NaSi2O4(OH)·H2O
Small rounded crystals of the extremely rare mercury mineral grumiplucite, associated to cinnabar and mercury. Type and only locality known worldwide!! Ex-"Not Only Stones" specimen. Identification by the team of "Not-Only-Stones" (Italy). From: Levigliani Mine, Stazzema, Lucca Province, Tuscany, Italy. Mineral

Grumiplucite

grumiplucite

Formula
HgBi2S4