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6323 results

Mineral

Cafeosite

cafeosite

Formula
Ca4Fe²⁺3Fe³⁺2◻O6S4
Cafetite, Lizardite, Calcite Base 4 mm Locality: Val di Serra Quarry, Pilcante, Ala, Lagarina Valley, Trento Province, Trentino-Alto Adige (Trentino-Südtirol), Italy Original description: Collection and photo Giorgio Bortolozzi Mineral

Cafetite

cafetite

Formula
CaTi2O5·H2O
Cahnite, Rhodonite Locality: Franklin Mine, Franklin, Franklin Mining District, Sussex County, New Jersey, USA (Locality at mindat.org) Size: 8.1 x 5.3 x 4.4 cm. A very impressive and attractive specimen of the rare calcium arsenic borate Cahnite from the Franklin mine. The piece comes from the Richard Kosnar and Frank Edwards collections, and retains the Frank Edwards label dating the piece to 1967. Cahnite was named after noted mineral dealer, Lazard Cahnite, and Franklin is the type locality for the species. The specimen hosts small chalk-white Cahnite crystals on beautifully contrasting pink Rhodonite. The closeup photo shows that the Cahnite crystals are terminated, and some of the Rhodonite crystals are remarkably gemmy and rich in color. The largest group of Cahnite crystals measures 1.1 cm across. Mineral

Cahnite

cahnite

Formula
Ca2[B(OH)4](AsO4)
Mohs
3
Mineral

Cairncrossite

cairncrossite

Formula
Sr2Ca7(Si4O10)4(OH)2·15H2O
Mineral

Calamaite

calamaite

Formula
Na2TiO(SO4)2*2H2O
Calaverite, Fluorite Locality: Cresson Mine, Eclipse Gulch, Cripple Creek District, Teller County, Colorado, USA (Locality at mindat.org) Size: 3.3 x 2.4 x 2.1 cm. The Cripple Creek District in Colorado was one of the most prolific Telluride producing mining districts in the United States. Telluride species from this area are highly sought after by collectors, and it is well justified as some superb examples are known from the various mines in the area. This specimen hosts a few excellent, sharp, highly splendent, tabular, striated, monoclinic crystals of the rare Gold Telluride, Calaverite which have a bronzy hue. The crystals have a classic association (for this mine) of purple Fluorite and are sitting against frosted grey Quartz crystal matrix. The largest Calaverite crystal measures a few mm in length which is typical for the species and the locality. These specimens are very difficult to obtain, and considering that the majority of them were mined over 100 years ago, the only source for specimens is old collections. Ex. Richard Kosnar Collection. Mineral

Calaverite

calaverite

Formula
AuTe2
White crystals of the rare calcium borate mineral calciborite from the type locality in Russia (Novofrolovskoye Deposit, Turjinsk, Turya River, Krasnotur'insk, Sverdlovsk Oblast, Russian Federation) and only one of the two known localities worldwide. Mineral

Calciborite

calciborite

Formula
CaB2O4
Mineral

Calcinaksite

calcinaksite

Formula
KNaCa(Si4O10)·H2O
Mineral

Calcio-Olivine

calcio-olivine

Formula
Ca2(SiO4)
Calcioancylite-(Ce) Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada (Locality at mindat.org) Field of view 3 mm. Depth of field is achieved with CombineZM. Specimen and photo Leon Hupperichs. Mineral

Calcioancylite-(Ce)

calcioancylite-(Ce)

Formula
(Ce,Ca,Sr)CO3(OH,H2O)
Mineral

Calcioancylite-(La)

calcioancylite-(La)
Mineral

Calcioancylite-(Nd)

calcioancylite-(Nd)

Formula
Nd2.8Ca1.2(CO3)4(OH)3·H2O
Mineral

Calcioandyrobertsite

calcioandyrobertsite

Formula
KCaCu5(AsO4)4(H2AsO4) * 2H2O
Calcioaravaipaite Field of view: 4 mm Locality: Somma-Vesuvius Complex, Campania, Italy Mineral

Calcioaravaipaite

calcioaravaipaite

Formula
PbCa2AlF9
Mineral

Calcioburbankite

calcioburbankite

Formula
Na3(Ca,Ce,Sr,La)3(CO3)5
Mineral

Calciocatapleiite

calciocatapleiite

Formula
CaZr(Si3O9) * 2H2O
Calciocopiapite, 50 mm, Dashkesan field, Dashkesan region, Azerbaijan, from M.A. Kashkai's collection Mineral

Calciocopiapite

calciocopiapite

Formula
CaFe³⁺4(SO4)6(OH)2·20H2O
Mineral

Calciodelrioite

calciodelrioite

Formula
Ca(VO3)2·4H2O
Calcioferrite Locality: Hagendorf South Pegmatite (Cornelia Mine; Hagendorf South Open Cut), Hagendorf, Waidhaus, Vohenstrauß, Oberpfälzer Wald, Upper Palatinate, Bavaria, Germany (Locality at mindat.org) Picture width 1,5 mm. Collection and photo Christian Rewitzer Mineral

Calcioferrite

calcioferrite

Formula
Ca2Fe³⁺2(PO4)3(OH) * 7H2O
Mineral

Calciohatertite

calciohatertite
Tan crystals of the rare Zr mineral calciohilairite (right) associated to prismatic orange crystals of kuzmenkoite-Mn (left). From Lovozero Massif, Murmansk Oblast, Russian Federation. Ex Dr Hartel collection and Ex Excalibur collection. Mineral

Calciohilairite

calciohilairite

Formula
CaZrSi3O9·3H2O
Mineral

Calciojohillerite

calciojohillerite

Formula
NaCaMg3(AsO4)3
(a) Numerous small brown crystals of thermaerogenite on colourless to white langbeinite with light blue urusovite, iron-black tenorite and minor green ericlaxmanite. Field width: 2.2 mm. (b) Abundant small brown crystals of thermaerogenite on white aphthitalite and iron-black hematite and tenorite. Field width: 3.5 mm. (c) Small brown crystals of thermaerogenite on colourless calciolangbeinite iron-black tenorite, light blue urusovite and green kozyrevskite. Field width: 0.8 mm. Mineral

Calciolangbeinite

calciolangbeinite

Formula
K2Ca2(SO4)3
Colour
colorlessness
Mineral

Calciomurmanite

calciomurmanite

Formula
(Na,☐)2Ca(Ti,Mg,Nb)4[Si2O7]2O2(OH,O)2(H2O)4