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Minerals

6323 results

Mineral

Gurzhiite

gurzhiite
Mineral Gustavit auf Pyrit, Bildhöhe 1,5 cm. Fundort: Rotgülden im Lungau, Salzburg, Österreich. Mineral

Gustavite

gustavite

Formula
AgPbBi3S6
Mineral

Gutkovaite-Mn

gutkovaite-Mn

Formula
CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4·5H2O
Brown crystal aggregates of the very rare chromium mineral guyanaite on a matrix of black eskolaite from the type locality for guyanaite: Merume River, Kamakusa, Mazaruni District, Guyana. Mineral

Guyanaite

guyanaite

Formula
CrO(OH)
Guérinite, Picropharmacolite Locality: Gabe Gottes Mine (incl. Giftgrube), Ste Marie-aux-Mines (Markirch), Haut-Rhin, Alsace, France White bladed guérinite crystals together with white acicular crystals of picropharmacolite. Field of view 5mm. Specimen and photo Leon Hupperichs. Mineral

Guérinite

guérinite

Formula
Ca5(AsO3OH)2(AsO4)2·9H2O
Mohs
1.5
Mineral

Gwihabaite

gwihabaite

Formula
(NH4)(NO3)
Gypsum Locality : Carresse-Cassaber, Pyrénées-Atlantiques - France Size 27 × 22 cm Mineral

Gypsum

Formula
CaSO4·2H2O
Mohs
2
Colour
Colourless, white
Colorless ball shaped crystal groupings of gyrolite covering the top of a thin matrix (7.5 × 7.0 × 4.5 cm). Collected from from Malad quarry, Malad, Mumbai Suburban district, Maharashtra, India. Mineral

Gyrolite

gyrolite

Formula
NaCa16(Si23Al)O60(OH)8·14H2O
Mineral

Gysinite-(Ce)

gysinite-(Ce)

Formula
PbCe(CO3)2(OH)(H2O)
Mineral

Gysinite-(La)

gysinite-(La)
Outstanding pink crystals of the very rare neodymium mineral gysinite-(Nd) from the TL in Kasompi (Kasompi Mine, Kolwezi, Lualaba, DR Congo), and only one of four localities known worldwide. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Gysinite-(Nd)

gysinite-(Nd)

Formula
PbNd(CO3)2(OH)·H2O
Görgeyite Locality: Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Oblysy (Atyrau Oblast'), Kazakhstan (Locality at mindat.org) Size: 3.8 x 3.2 x 1.5 cm. Gorgeyite is a very rare, hydrated sulfate found in only four localities worldwide. This aesthetic, very sculptural specimen consists of extremely lustrous and gemmy, yellow-tan, multi-pronged crystals, some of which are doubly terminated. Most unusual for the quality and symmetry of the piece. This remote locality has produced best of species. A fine, pristine example obtained long ago from the Fersman Museum of Moscow. Mineral

Görgeyite

görgeyite

Formula
K2Ca5(SO4)6(H2O)
Mohs
3.5
Götzenite, Fluorite, Calcite Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada The götzenite blades (to ~ 12 mm) look like old ivory. Ex Ron Waddell. MOB coll. The label says "götzenite" and I thought this was my best. But I couldn't ID the orange micaceous looking flakes (top). So I tested for polylithionite with UV. No glow. But the götzenite (bottom) did glow. Strong lemony white (SW). Similar to elpidite from the Poudrette pegmatite. But it has now been verified (EDS) as götzenite by Tony S at ROM! Score one for Ron. The fluorescence is a mystery. Other götzenites from MSH do not fluoresce. Sept 2009: Updated using stacking and added stereo and "backside" views. As for the "micaceous" yellowish flakes, my old friend H. Cl tells me that they are calcite. So now it makes sense. This specimen is from marble xenolith - the usual hiding place for götzenite at MSH. Mineral

Götzenite

götzenite

Formula
Ca4NaCa2Ti(Si2O7)2(OF)F2
Colorless tabular plates of the very rare new mineral günterblassite (IMA 2011-032) from the type and only known locality worldwide (Rother Kopf, Roth, Eifel Mountains, Germany). Mineral

Günterblassite

günterblassite

Formula
(K,Ca,Ba,Na,☐)3Fe[(Si,Al)13O25(OH,O)4]·7H2O
Mohs
4
Bronze crystals of the extremely rare Fe-Mg sulphide mineral haapalaite from the type locality in Kokka mine (Outokumpu, North Karelia, Finland) and one of the very few localities known worldwide. Very rich specimen of this very rare species for the quantity of microcrystals and crystal aggregates present. Mineral

Haapalaite

haapalaite

Formula
(Fe²⁺,Ni)2(Mg,Fe²⁺)1.61S2(OH)3.22
Very small brown single crystals of the extremely rare hafnium mineral hafnon from a locality in Canada (Bernic Lake, Lac-du-Bonnet District, Manitoba, Canada). From a total of 5638 mineral species known only one hafnium mineral exists (source Mindat), it is hafnon. Analyzed specimen by SEM/EDS. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Hafnon

hafnon

Formula
HfSiO4
Mohs
7.5
Hagendorfite Locality: Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia (Locality at mindat.org) Size: thumbnail, 1.8 x 1.4 x 0.9 cm Hagendorfite Hagendorfite is a rare iron phosphate, and I personally have never seen one. However, this is an old piece purchased from David New's famous old mail order species lists, in 1976. Although small, it seems rich and well-crystallized with sharp clusters of crystals to 4mm. There is a hint of green-brown color, in person. Ex. John White Collection. Mineral

Hagendorfite

hagendorfite

Formula
NaCaMn²⁺Fe²⁺2(PO4)3
Mineral

Haggertyite

haggertyite
Mineral

Hagstromite

hagstromite
White crystals of haidingerite associated to yellow orpiment and red realgar. From: White Caps Mine, Manhattan District, Nevada, United States of America. Mineral

Haidingerite

haidingerite

Formula
Ca(AsO3OH)·H2O
Mineral

Haigerachite

haigerachite

Formula
KFe³⁺3(HPO4)2(H2PO4)6 * 4H2O
Haineaultite, Analcime, Natrolite Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada (Locality at mindat.org) This specimen would be considered a very rich example because of the eye-visible wealth of bright , gemmy yellow crystals present; and comes with a label from Gilles Haineault showing that he collected it in April of 2000. The crystals are not sparse at all and a whole seam of them is easily seen without needed visual aid. The piece has several very sharp crystals to 2mm. 3.5 x 2.9 x 2.1 cm Mineral

Haineaultite

haineaultite

Formula
(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 * 5H2O
Outstanding long yellow prismatic crystals of the very rare REE mineral hainite-(Y) from Bortolan Quarry (Pocos de Caldas, Minas Gerais, Brazil). Mineral

Hainite-(Y)

hainite-(Y)

Formula
(Ca3Y)Na(NaCa)Ti(Si2O7)2(OF)F2
Mineral

Haitaite-(La)

haitaite-(La)