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Minerals

6323 results

Mineral

Natronambulite

natronambulite

Formula
(Na,Li)(Mn,Ca)4Si5O14OH
Light brown single crystals of the very rare niobium mineral natroniobite from a locality in Russia (Lesnaya Varaka Massif, Murmansk Oblast, Russian Federation) associated to some unknown colorless single crystals. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Natroniobite

natroniobite

Formula
NaNbO3
Mineral

Natropalermoite

natropalermoite

Formula
Na2SrAl4(PO4)4(OH)4
:Locality: María Josefa Mine, El Madroñal, Rodalquilar, Andalusia, Spain Size: 3.6 × 3.4 × 2.2 cm Description: In this specimen we have different arsenates. Colorless cubic crystals are natropharmacoalumite, accompanied by yellowish natropharmacosiderite. In some crystals you can observe a yellowish crystal core with colorless external part of both species. Small lemon yellow crytals has been identified as pharmacoalumite. The name of natropharmacoalumite is in allusion to the cation dominance of Na and Al. Mineral

Natropharmacoalumite

natropharmacoalumite

Formula
NaAl4(AsO4)3(OH)4·4H2O
Yellow crystals Natropharmacosiderite on matrix; Photo and collection Fernando Brederodes. From: María Josefa Mine, Rodalquilar, Níjar, Almería, Andalusia, Spain. Mineral

Natropharmacosiderite

natropharmacosiderite

Formula
(Na,K)Fe³⁺4(AsO4)3(OH)4 * 6-7H2O
Natrophilite, Lithiophilite Locality: Abija N. Fillow Quarry (Branchville Quarry), Branchville, Redding, Fairfield County, Connecticut, USA (Locality at mindat.org) Size: 3.7 x 2.2 x 1.9 cm. A rare phosphate, from the type locality circa late 1800s. The natrophilite appears on the back of the specimen (see closeup view). Ex. G.J. Brush collection at Yale, so this was considered an important enough representative example that the Academy had to trade for it, to get the species. The presence of natrophilite as thin coatings and fracture fillings has been verified by Dr. Mark Feinglos. Further examination by Dr. Feinglos revealed the presence of lithiophilite and metaswitzerite, as well. Ex. Philadelphia Academy of Sciences Collection. Mineral

Natrophilite

natrophilite

Formula
NaMn²⁺PO4
White crystals of the rare phosphate mineral natrophosphate associated to orange villiaumite from the type locality in Rasvumchorr (Rasvumtchorr, Khibiny, Kola, Russian Federation). Mineral

Natrophosphate

natrophosphate

Formula
Na7(PO4)2F * 19H2O
Gift from Tony Steede – thanks Tony! Modris Baum coll. The natrosilite consists of the reflective laths/plates in the center. I used the reflections to make the stuff visible.. In reality the laths are colorless and more or less transparent. Head-on, without reflections, the laths are almost impossible to spot – which explains why I left the green arrow on for the photo. Small as the specimen is, finding the natrosilite again without the help of an arrow seemed too iffy. So how did anybody spot this in the first place? No doubt the find had larger segregations of natrosilite which were more obvious. Modified by CombineZP. From: Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada Mineral

Natrosilite

natrosilite

Formula
Na2Si2O5
Mineral

Natrosulfatourea

natrosulfatourea
Mineral

Natrotantite

natrotantite

Formula
Na2Ta4O11
Mineral

Natrotitanite

natrotitanite

Formula
(Na0.5Y0.5)TiO(SiO4)
Natrouranospinita de la mina Eureka, a Castell-estaó, La Torre de Cabdella (Pallars Jussà, Alt Pirineu i Aran, Catalunya). Mineral

Natrouranospinite

natrouranospinite

Formula
(Na2,Ca)(UO2)2(AsO4)2 * 5H2O
Mohs
2.5
Mineral

Natrowalentaite

natrowalentaite

Formula
[Fe³⁺0.5Na0.5(H2O)6][NaAs³⁺2(Fe³⁺2.33W6+0.67)(PO4)2O7]
Brown aggregates of the very rare organic mineral natroxalate from Chile (Pabellon de Pica, Chanabaya, Iquique Province, Tarapacá Region, Chile). Deliquescent. Ex. Erich Laskowski collection (USA). Mineral

Natroxalate

natroxalate

Formula
Na2(C2O4)
Mohs
3
Natrozippeite, Locality: Bukov Mine, Rožná, Czech Republic, width: 23 mm Mineral

Natrozippeite

natrozippeite

Formula
Na5(UO2)8(SO4)4O5(OH)3 * 12H2O
Mohs
2
Naujakasite Locality: Naujakasik (Naajakasik), Tunugdliarfik Firth (Eriksfjord), Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland (Locality at mindat.org) A sharp 1.4 cm crystal perched on matrix is the predominant feature here, but on the backside there is a cleaved-in-half partial crystal measuring a whopping 3 cm across, as well! This is an extremely rare species from the type locality, and this should be considered an excellent crystal. 4 x 3 x 3 cm Mineral

Naujakasite

naujakasite

Formula
(Na,K)6(Fe²⁺,Mn²⁺,Ca)(Al,Fe)4Si8O26
beta-Ag2Se structure. Silver atoms are blue Mineral

Naumannite

naumannite

Formula
Ag2Se
Mohs
2.5
Navajoite Locality: Monument No. 2 Mine, Monument No. 2 channel, Monument Valley, Navajo Indian Reservation, Apache County, Arizona, USA (Locality at mindat.org) The patina on the foliated back side of this specimen is similar to that of copper. The front, or display side contains an area of minute, sparkling, silver colored, metallic, vanadium oxide, crystals. They are platy or lameller. The specimen is accompanied by a 1951 label belonging to Otto Ray and a later label out of the collection of Les Presmyk. Navajoite is a very rare hydrated vanadium oxide, and this is an exceedingly rich specimen from the type locality! (Original label said Monument No. 1 mine) 7.2 x 6.4 x 4.0 cm Mineral

Navajoite

navajoite

Formula
Fe³⁺V5+9O24 * 12H2O
Mineral

Navrotskyite

navrotskyite

Formula
K2Na10(UO2)3(SO4)9·2H2O
Mineral

Nazarchukite

nazarchukite

Formula
Ca2NiFe³⁺2(PO4)4
Mineral

Nazarovite

nazarovite
Nchwaningite is an extremely rare manganese silicate mineral only known from two localities in Kalahari, worldwide. It occurs as brown acicular aggregates. From: NChwaning II Mine, Kuruman, North Cape Province, South Africa. Mineral

Nchwaningite

nchwaningite

Formula
Mn2SiO3(OH)2·H2O
Nealite Locality: Vrissaki Point slag locality, Vrissaki area, Lavrion District slag localities, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece Width 2 mm. Collection and Photo Christian Rewitzer Mineral

Nealite

nealite

Formula
Pb4Fe(AsO3)2Cl4·2H2O
Mohs
4
Mineral

Nechelyustovite

nechelyustovite

Formula
(Na☐)☐2Ba4Ti4Nb4(Na11☐)Ti4(Si2O7)8O8(OH)8(H2O)12