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Minerals

6323 results

Mineral

Nigelcookite

nigelcookite

Formula
PbFe²⁺2V³⁺2(PO4)3(OH)3
Metallic inclusions of the extremely rare platinum stannide niggliite in a platinum nugget from Alaska (Fox Gulch, Goodnews Bay, Bethel Borough, Alaska, United States of America). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Niggliite

niggliite

Formula
PtSn
Mohs
5.5
Niigataite exhibited at the Mining Museum of Akita University Mineral

Niigataite

niigataite

Formula
CaSrAl3[Si2O7][SiO4]O(OH)
Nikischerite Dimensions: 0.6 cm x 0.6 cm x 0.5 cm Locality: Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia (Locality at mindat.org) This is a very hard-to-find specimen of the rare sulfate Nikischerite (named for Tony Nikischer). This mineral is the iron analogue of the manganese species Shigaite. This piece features a semi-lustrous, layered, brown (green underneath) spherical crystal group. Keep in mind that these pieces are essentially from a one time find at Huanuni. This specimen was acquired at the mine at Huanuni by Brian Kosnar. In Brian's estimation, there may be no more than 200 specimens of this species in the world Mineral

Nikischerite

nikischerite

Formula
Fe²⁺6Al3(OH)18[Na(H2O)6](SO4)2 * 6H2O
Mohs
2
Mineral

Nikmelnikovite

nikmelnikovite

Formula
Ca12Fe²⁺Fe³⁺3Al3(SiO4)6(OH)20
Mineral

Niksergievite

niksergievite

Formula
Ba2Al3(Si,Al)4O10(CO3)(OH)6·nH2O
Brittle green mass of pimelite, nimite and chrysoprase. From Mindat: 'Excavation of the locality arranged by the 1st Mindat conference organizers in July, 2010 resulted in a major find of exceptional pimelite specimens and a mineralogical investigation is underway to re-validate the species.' Mineral

Nimite

nimite

Formula
(Ni,Mg,Al)6(Si,Al)4O10(OH)8
Mohs
3
A specimen of the very rare mineral ningyoite from the type locality (Ningyo-toge Mine, Tottori Prefecture, Honshu Island, Japan). Ningyoite occurs as almost black crystal aggregates in a small pieces of matrix. Mineral

Ningyoite

ningyoite

Formula
(U,Ca,Ce)2(PO4)2·1-2H2O
Mineral

Niningerite

niningerite

Formula
MgS
Greenish crystal aggregates of nioboaeschynite-(Ce) from Madagascar (Manjaka, Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascar). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Nioboaeschynite-(Ce)

nioboaeschynite-(Ce)

Formula
(Ce,Ca)(Nb,Ti)2(O,OH)6
Mineral

Nioboaeschynite-(Y)

nioboaeschynite-(Y)

Formula
(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6
Mineral

Niobobaotite

niobobaotite
Unpolished microprobe preparate of about 0,20 x 0,12 x 0,06 mm grain of pinkish NIOBOCARBIDE from the type and only known locality worldwide completely analyzed. Part of holotype, portion of original material sold by Krantz to FMM in 1912 and collected at the beginning of XX century. This material was investigated and led to an article describing the new mineral niobocarbide from platinum placers of the Urals. Mineral

Niobocarbide

niobocarbide

Formula
(Nb,Ta)C
Mineral

Nioboheftetjernite

nioboheftetjernite
Mineral

Nioboholtite

nioboholtite

Formula
(Nb0.6☐0.4)Al6BSi3O18
Mineral

Nioboixiolite-(Fe²⁺)

nioboixiolite-(Fe²⁺)

Formula
Nb2Fe²⁺O6
Mineral

Nioboixiolite-(Mn²⁺)

nioboixiolite-(Mn²⁺)
(C) backscattered electron (BSE) image of separated nioboixiolite-(□) grain showing the columbite-(Fe) being replaced by nioboixiolite-(□). Abbreviations: Nbx = nioboixiolite-(□), Col = columbite-(Fe). Mineral

Nioboixiolite-(◻)

nioboixiolite-(◻)

Formula
(Nb0,8☐0,2)⁴⁺O2
FOV 3.8x 2.5 mm. Thanks to Ralph Thomas. Analyzed find. MOB coll. Golden to reddish brown niobokulpetskite with black aegirine prisms and very thin, transparent, platy albite. Associated with (verified) franconite. From: Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada. Mineral

Niobokupletskite

niobokupletskite

Formula
K2NaMn²⁺7(Nb,Ti)(Si4O12)2O2(OH)4(O,F)
Niobophyllite Locality: Mt Malosa, Zomba District, Malawi (Locality at mindat.org) Size: thumbnail, 2.8 x 2 x 1.5 cm Niobophyllite with Feldspar, Aegerine I have followed, or so I thought, the new finds out of Mt Maloso for the past 7-8 years pretty well. In that time, I have had lots of aegerine and arfvedsonite, zircon, parisite, etc etc....but I had never seen one of these and in fact I'd never even heard of the species before now and had to go look it up: it is a titanium and niobium-containing fluorosilicate, nicely complex and interesting. It was only recently reported (Lapis, 2003) from this new locality for the species. I am told that these are the best, compared to previous occurences. This piece features tightly packed, bladed crystals of a rusty orange color, accented by feldspar and aegerine. It is quite non-ugly in person, surprisingly enough. 2.8 x 2 x 1.5 cm Mineral

Niobophyllite

niobophyllite

Formula
(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31
Terminated crystal of niocalite in carbonatite matrix. Total length of crystal was 5mm. Collected 2007 - Donald Doell. From: St Lawrence Columbium Mine, Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada. Mineral

Niocalite

niocalite

Formula
Ca7Nb(Si2O7)2O3F
Mineral

Nipalarsite

nipalarsite

Formula
Ni8Pd3As4
Mineral

Nipeiite-(Ce)

nipeiite-(Ce)

Formula
Ce9Fe³⁺(SiO4)6[SiO3(OH)](OH)3
Metallic crystals of this very rare nickel antimonide from a Swedish locality: Gruvasen, Persberg, Värmland, Sweden. Mineral

Nisbite

nisbite

Formula
NiSb2