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6323 results

Alacránite from former Kateřina Mine, Radvanice, Trutnov District, Czech Republic (1999) Mineral

Alacránite

alacránite

Formula
As8S9
Mohs
1.5
Alamosite, Leadhillite, Melanotekite Locality: Tsumeb, Otjikoto (Oshikoto) Region, Namibia (Locality at mindat.org) Size: miniature, 3.5 x 2.5 x 1.5 cm Alamosite, Melanotekite, Leadhillite A small piece but truly oustanding for the finely crystallized alamosite on matrix of finely crysatllized leadhillite, and for the richeness and near-record size of the melanotekite! The overall combination is a relative value in that you get three very rare minerals, in excellent crystals, altogether - and in a displayable specimen, no less! Mineral

Alamosite

alamosite

Formula
PbSiO3
Mohs
4.5
:Locality: Great Fissure Eruption, Tolbachik Volcano, Far Eastern Region, Russian Federation Size: 0.2 × 0.2 × 0.2 cm Description: Two small (0.25 and 0.20 mm) aggregates of alarsite crystals from this incredible volcano with more than 100 Type Locality species. Alarsite is a extremelly rare aluminum arsenate AlAsO4. Analyzed. The mineral occurs in the fumarolic deposits of the Great Tolbachik fissure extrusion, in the SE of the Kamchatka Peninsula, and it is associated with very rare species like langbeinite, fedotovite, kluychevskite, lammerite, etc. Mineral

Alarsite

alarsite

Formula
AlAsO4
Mineral

Albertiniite

albertiniite

Formula
Fe²⁺(SO3)·3H2O
Albite Locality : Pfitsch pass, Zamser Grund (Zams valley), Ziller valley, North Tyrol, Tyrol, Austria Size 15x14x6.7 cm Mineral

Albite

albite

Formula
NaAlSi3O8
Colour
chatoyancy, grey, white, red, green, blue
Mineral

Albrechtschraufite

albrechtschraufite

Formula
MgCa4F2[UO2(CO3)3]2·17-18H2O
Mohs
2.75
(d) A small grain of alburnite (alb) associated with hessite and galena. Sample DDH31-79.5. Full article: https://www.cambridge.org/core/journals/mineralogical-magazine/article/enrichment-in-critical-metals-inge-and-tese-in-epithermal-deposits-of-the-la-carolina-district-san-luis-argentina/4DDF8BACF22CE81BC62482309D4C7B37 Mineral

Alburnite

alburnite

Formula
Ag8GeTe2S4
Alcantarillaite. Sphere section showing lamellar crystals, on quartz. Alcantarilla mine, Belacázar, Córdoba, Spain. Type locality Mineral

Alcantarillaite

alcantarillaite
Mineral

Alcaparrosaite

alcaparrosaite

Formula
K3Ti⁴⁺Fe³⁺(SO4)4O(H2O)2
White globular aggregates of the rare mineral aldermanite from the type locality (Moculta Phosphate Quarry, Angaston, South Australia, Australia) and of the very few known localities, all of them in South Australia. Mineral

Aldermanite

aldermanite

Formula
Mg5Al12(PO4)8(OH)22·32H2O
Mohs
2
Picture of subhedral crystals of dark orange aldomarinoite and yellow tilasite within a quartz vein from the holotype, catalogue no. MCMGPG-H2021–001. 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

Aldomarinoite

aldomarinoite
Outstanding pale blue crystals of the very rare cadmium mineral aldridgeite (IMA 2010-019) from one of the only three known localities worldwide: Kelly Mine, Magdalena, Socorro County, New Mexico, United States of America. Mineral

Aldridgeite

aldridgeite

Formula
(Cd,Ca)(Cu,Zn)4(SO4)2(OH)6·3H2O
Mineral

Aleksandrovite

aleksandrovite

Formula
KCa7Sn2Li3Si12O36F2
Silvery black crystal aggregates of the extremely rare Pb-Bi telluride mineral aleksite from one of the few known localities worldwide on a contrasting matrix. From: Keystone Canyon, Nye County, Nevada, United States of America. Mineral

Aleksite

aleksite

Formula
PbBi2Te2S2
Mohs
2
Mineral

Aleutite

aleutite

Formula
[Cu5O2](AsO4)(VO4)·(Cu,K,Pb,Rb,Cs,)Cl
Mineral

Alexearlite

alexearlite

Formula
Hg3(MoO4)S2
Mineral

Alexkhomyakovite

alexkhomyakovite

Formula
K6(Ca2Na)(CO3)5Cl·6H2O
Mineral

Alexkuznetsovite-(Ce)

alexkuznetsovite-(Ce)
Mineral

Alexkuznetsovite-(La)

alexkuznetsovite-(La)
Mineral

Alexshubnikovite

alexshubnikovite

Formula
Ca2Cu9(AsO4)4(OH)9Cl(H2O)8·2H2O
Mineral

Alflarsenite

alflarsenite

Formula
NaCa2Be3Si4O13(OH)·2H2O
White vitreous microinclusions of the extremely rare Ba phosphate chloride mineral alforsite associated to rose red gillespite from California (Trumbull Peak, Mariposa County, California, United States of America). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Alforsite

alforsite

Formula
Ba5(PO4)3Cl
Mohs
5
Mineral

Alfredcasparite

alfredcasparite

Formula
Sr2TiO(Si2O7)
Alfredopetrovite, Ahlfeldite, Chalcomenite Locality: El Dragón Mine, Quijarro Province, Potosi Department, Bolivia Size: 1.3 cm × 0.7 cm × 0.8 cm Description: Druse of tiny alfredopetrovite crystals, colorless to greyish tone, coating over blue chalcomenite and pink ahlfeldite. Some areas, with no colored background minerals, let us to see perfectly crystals. You can also observe face reflections of this extremely rare species. Alfredopetrovite is the first aluminium selenite mineral. On a kruťait-penroseite matrix. Mineral

Alfredopetrovite

alfredopetrovite

Formula
Al2(Se⁴⁺O3)3·6H2O
Mohs
2.5