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Minerals

6323 results

Mineral

Adolfpateraite

adolfpateraite

Formula
K(UO2)(SO4)(OH)(H2O)
Dark brown perfect crystals of the extremely rare new mineral therasiaite (IMA 2013-050) from the famous locality La Fossa Crater (Vulcano Island, Aeolian Islands, Sicily, Italy), on adranosite crystals. Formula: (NH4)3KNa2Fe2+Fe3+(SO4)3Cl5. The sample is completely sealed in nitrogen atmosphere, so it is perfectly stable. It is a one locality mineral worldwide, and in La Fossa Crater only a few specimens have been found, so it is a very sought after mineral!. The photo have been made through the plasticbox, so quality is not very high. Mineral

Adranosite

adranosite

Formula
(NH4)4NaAl2(SO4)4Cl(OH)2
Colour
colorlessness, white
Mineral

Adranosite-(Fe)

adranosite-(Fe)

Formula
(NH4)4NaFe2(SO4)4Cl(OH)2
Mineral

Adrianite

adrianite

Formula
Ca12(Al4Mg3Si7)O32Cl6
Aegirine, Orthoclase Locality: Mt Malosa, Zomba District, Malawi (Locality at mindat.org) A strikingly aesthetic 3-dimensional combination of jet-black aegirines (to 3 cm) splaying out from matrix of feldspar! The lustre, form, and sharpness of these crystals is WAY above par and most people consider this locale to be the world's finest source for the species...while this piece would be, in quality, right at the top of what has been found to date. 6.0 x 5.4 x 4.7 cm Mineral

Aegirine

aegirine

Formula
NaFe³⁺Si2O6
Mohs
6.3
Aegirine-augite Field of view: 1 mm Locality: In den Dellen Quarry, Mendig, Germany Mineral

Aegirine-Augite

aegirine-augite

Formula
(Ca,Na)(Fe³⁺,Mg,Fe²⁺)Si2O6
Aenigmatite (Field of view 4.84 mm) Locality: Água de Pau Volcano (Fogo Volcano), Água de Pau Massif, São Miguel Island, Azores District, Portugal Aenigmatite crystal on sanidine. Mineral

Aenigmatite

aenigmatite

Formula
Na4[Fe²⁺10Ti2]O4[Si12O36]
Mohs
5.5
Quartz, Aerinite Locality: Olvera Ophite, Olvera, Cádiz, Andalusia, Spain (Locality at mindat.org) Size: 1.0 x 1.4 x 0.8 cm. A RARE and showy thumbnail cluster of lustrous, deep blue, dipyramidal quartz crystals colored by aerinite inclusions from near Malaga, Spain. Aerinite is a RARE silicate, found worldwide almost exclusively in Spain. A well-written article on this find is found in the Mineralogical Record, Volume 27, Number 2, 1996. Mineral

Aerinite

aerinite

Formula
(Ca,Na)6(Fe³⁺,Fe²⁺,Mg,Al)4(Al,Mg)6Si12O36(OH)12(CO3)·12H2O
Mohs
3
Aerugite Locality: Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany (Locality at mindat.org) Size: 1.7 x 0.9 x 0.8 cm The aerugite is both the lighter green and darker green material that's visible on the top face (confirmed by Dr. Mark Feinglos). The greenish yellow mineral is xanthiosite. I am told (though there is no way to prove it now), as it was in the American Museum by the late 1800s with catalogue number 5305 there. From the rarities suite of Lawrence Conklin, who exchanged it from the American Museum of Natural History. Mineral

Aerugite

aerugite

Formula
Ni8.5(AsO4)2As⁵⁺O8
Mohs
4
Mineral

Aeschynite-(Ce)

aeschynite-(Ce)

Formula
Ce(TiNb)O6
Mineral

Aeschynite-(Nd)

aeschynite-(Nd)

Formula
Nd(TiNb)O6
Aeschynite-(Y) Locality: Urstad feldspar quarry, Hidra (Hitterø), Flekkefjord, Vest-Agder, Norway (Locality at mindat.org) Size: 2.7 x 2.1 x 1.3 cm Aeschynite-(Y) is a rare, rare-earth species with yttrium as the dominant rare-earth element. This extremely rich piece is from the Type Locality in Norway. Splendent, waxy-lustre, deep brown to nearly black aeschynite-(Y) composes nearly the entire piece, with only a bit of matrix. The specimen looks like obsidian with the conchoidal fracturing, but its not. Ex. Josef Vajdak Collection. Mineral

Aeschynite-(Y)

aeschynite-(Y)

Formula
Y(TiNb)O6
afghanite, pyrite, calcite : Sar-e-Sang (Sar Sang ; Sary Sang), Koksha Valley (Kokscha Valley ; Kokcha Valley), Khash & Kuran Wa Munjan Districts, Badakhshan Province (Badakshan Province ; Badahsan Province), Afghanistan Mineral

Afghanite

afghanite

Formula
(Na,K)22Ca10(Si24Al24)O96(SO4)6Cl6
Colour
colorless, blue
:Locality: Fumade, Tarn, Midi-Pyrénées, France Size: 2.1 × 1.8 × 1.6 cm Description: Afmite is a rare aluminium phosphate named after of my beloved Association Française de Microminéralogie (AFM, IMA 2005-025a), but approved in 2010. In this sample we can enjoy rich groups of "open book" white (they are transparent) aggregates of tabular crystals. From the Type Locality and one of the only three localities known worldwide. Mineral

Afmite

afmite

Formula
Al3(OH)4(H2O)3(PO4)(PO3OH)·H2O
Afwillite Locality: Campomorto Quarry, Pietra Massa Locality, Montalto di Castro, Viterbo Province, Latium, Italy Original description: 1.03 mm group of Afwillite crystals. Collection Domenico Preite photo Matteo Chinellato Mineral

Afwillite

afwillite

Formula
Ca3[SiO3(OH)]2·2H2O
Mineral

Agaite

agaite

Formula
Pb3Cu²⁺Te⁶⁺O5(OH)2(CO3)
Colour
blue
Mineral

Agakhanovite-(Y)

agakhanovite-(Y)

Formula
YCa☐2KBe3Si12O30
Mohs
6
Agardite-(Ce) Dimensions: Spray 0,5 mm Locality: Clara Mine, Oberwolfach, Black Forest, Baden-Württemberg, Germany Mineral

Agardite-(Ce)

agardite-(Ce)

Formula
CeCu²⁺6(AsO4)3(OH)6·3H2O
Mohs
3
Graulichite-(La), as yellow rhombohedral crystals with thin needles of agardite-(La). Field of view: 0.5 mm. Collection Georges Favreau, photo Pierre Clolus. 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

Agardite-(La)

agardite-(La)

Formula
LaCu²⁺6(AsO4)3(OH)6·3H2O
Agardite-(Nd) Field of view: 2 mm Locality: Level 4, Hilarion Mine, Kamariza, Lavrion District, Attica, Greece Mineral

Agardite-(Nd)

agardite-(Nd)

Formula
NdCu²⁺6(AsO4)3(OH)6·3H2O
Agardite-(Y) - Greece, Attica, Lavrion District, Kamariza, Hilarion Mine, Level 4 - 1 mm Mineral

Agardite-(Y)

agardite-(Y)

Formula
YCu²⁺6(AsO4)3(OH)6·3H2O
Mineral

Agmantinite

agmantinite

Formula
Ag2MnSnS4
Museo di storia naturale (Florence), Mineralogy section: Fluorescent Agrellite Mineral

Agrellite

agrellite

Formula
NaCa2Si4O10F
Mohs
5.5
Outstanding yellow-green crystals of the very rare uranium mineral agricolaite from the famous Jachymov district (Jáchymov, Krušné Hory, Karlovy Vary Region, Czech Republic). Ex. Erich Laskowski collection (USA). Mineral

Agricolaite

agricolaite

Formula
K4(UO2)(CO3)3
Mohs
4