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Pale violet crystals of the very rare sulphate mineral quenstedtite from this Chilean locality (Barranca del Sulfato, Mejillones, Antofagasta Region, Chile), associated to blue chalcanthite and yellow copiapite. Mineral

Quenstedtite

quenstedtite

Formula
Fe2(SO4)3·11H2O
Mohs
2.5
Quetzalcoatlite Locality: Bambollita Mine (Oriental Mine), Moctezuma, Mun. de Moctezuma, Sonora, Mexico Blue quetzalcoatlite on quartz. Picture width 2 mm. Collection and photograph Christian Rewitzer Mineral

Quetzalcoatlite

quetzalcoatlite

Formula
Cu²⁺3Zn6Te⁶⁺2O12(OH)6·(Ag,Pb,☐)Cl
Mohs
3
Mineral

Quijarroite

quijarroite

Formula
Cu6HgPb2Bi4Se12
Quintinite Locality: Jacupiranga Mine, Cajati, São Paulo, Brazil Field of view 7 mm. Specimen and photo Leon Hupperichs. Mineral

Quintinite

quintinite

Formula
Mg4Al2(OH)12(CO3)·3H2O
Mohs
2
Mineral

Qusongite

qusongite

Formula
WC
Mineral

Raadeite

raadeite

Formula
Mg7(PO4)2(OH)8
Rabbittite, Schröckingerite Field of view: 3.5 mm Fundort: Uranus Mine, Kleinrückerswalde, Annaberg-Buchholz, Erzgebirgskreis, Saxony, Germany Description: Rabbittite with high F content and tabular green schröckingerite Mineral

Rabbittite

rabbittite

Formula
Ca3Mg3(UO2)2(CO3)6(OH)4·18H2O
Mohs
2.5
Rabejacite - Czech Rep., Karlovy Vary, Hanusov, Plavno Mine - 1,5 mm. Photos from tomeikminerals.com can be used under a Creative Commons Licenese 4.0 CC-BY, as explained in: https://www.tomeikminerals.com/about-me. Mineral

Rabejacite

rabejacite

Formula
Ca2[(UO2)4O4(SO4)2](H2O)8
Mineral

Raberite

raberite

Formula
Tl5Ag4As6SbS15
Mineral

Radekškodaite-(Ce)

radekškodaite-(Ce)
Mineral

Radekškodaite-(La)

radekškodaite-(La)
Mineral

Radhakrishnaite

radhakrishnaite

Formula
PbTe3(Cl,S)2
Mineral

Radovanite

radovanite

Formula
Cu2Fe³⁺(AsO4)(HAs³⁺O3)2 * H2O
Mineral

Radtkeite

radtkeite

Formula
Hg²⁺3S2ICl
White radvaniceite fibres formed cotton-like aggregates in association with orange stangersite crystals; locality, Radvanice; field of view, 5 mm; photo, J. Sejkora. 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

Radvaniceite

radvaniceite

Formula
GeS2
Striated grey metallic raguinite crystals on realgar from the type locality Allchar. From: Crven Dol Mine, Allchar, Roszdan, Macedonia (former Yugoslav Republic). Raguinite is a very rare thallium mineral. Mineral

Raguinite

raguinite

Formula
TlFeS2
Raisaite is an extremely rare hydrated copper magnesium tellurate mineral (IMA 2014-046) found in only one locality worldwide: Sentyabr’skoe Deposit, Chukotskii Autonomous Okrug, Far Eastern Region, Russian Federation. It occurs as minute sky-blue needles, sprays and coatings with colorless gypsum on a hessite/petzite bearing quartzite matrix. Mineral

Raisaite

raisaite

Formula
CuMg[Te⁶⁺O4(OH)2]·6H2O
Raite (picture width: 3.7 x 2.5 mm) Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada Golden raite "suns" on dark red/brown "eudialyte" (mostly covered by a thin unid coating). From an analyzed find with steenstrupine-(Ce), lovozerite group etc., etc. The raite color in this find varied greatly but it was determined to be all raite (no yofortierite). The raite is unusually enriched in Zn however. (Thanks to Tony Steede for this information.) Mineral

Raite

raite

Mohs
3
Sparse crusts of light green Rajite covering a small piece of silicified rhyolite. Locality: Lone Pine Mine, Lone Pine Hill area, Wilcox District, Catron Co., New Mexico, USA Mineral

Rajite

rajite

Formula
Cu(Te4+2O5)
Very nice and well formed rakovanite crystals from the type locality: Sunday Mine, Slick Rock Mining District, San Miguel Co., Colorado, USA. Mineral

Rakovanite

rakovanite

Formula
Na3{H3[V10O28]}·15H2O
Tiny black crystal of the extremely rare Lengenbach minerals stalderite-ralphcannonite (this one, new species: IMA 2014-077) in a small matrix of realgar.Stalderite and ralphcannonite form a series, where stalderite is the Cu-end member and ralphcannonite is the Ag-end member. This crystal was analyzed by EDX and it is stalderite (61%) and ralphcannonite (39%).In addition, this specimen is a part of the type specimen of ralphcannonite (!), that is, the specimen that was used for the description of the species! Only very few specimens known of both species. After the book "Faszination Lengenbach (2008)" we know that the total number of stalderite specimens known was only 9! Specimen found in 1989. Mineral

Ralphcannonite

ralphcannonite

Formula
AgZn2TlAs2S6
A single tiny green grain of the extremely rare Ramaccioniite. EDS analysed. Previously in the Dr. Frank Keutsch collection. From: Los Llantenes mining district, La Rioja Province, Argentina. Mineral

Ramaccioniite

ramaccioniite

Formula
Cu4[SeO4](OH)6
Mineral

Ramanite-(Cs)

ramanite-(Cs)

Formula
CsB5O6(OH)4·2H2O
Mineral

Ramanite-(Rb)

ramanite-(Rb)

Formula
RbB5O6(OH)4·2H2O