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6323 results

Mineral

Ikorskyite

ikorskyite

Formula
KMn³⁺(Si4O10)·3H2O
Ikranite, Aegirine (FOV is ~ 13 x 11 mm) Locality: Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast, Northern Region, Russia Original description: Brownish-yellow Ikranite grain in fibrous Aegirine-III aggregate from axial zone of nepheline-syenite pegmatite. The grain contain brownish-red to violet-red zones of alteration, composed by apparently new specie - oxi-variety of Ikranite. Holotype specimen - part of the single known boulder, find on dumps of Karnasurt mine. Collected by Nikita V. Chukanov. Pavel M. Kartashov collection and specimen. Mineral

Ikranite

ikranite

Formula
(Na,H3O)15(Ca,Mn²⁺)6Fe³⁺2Zr3[(H0-3Si3O9)2(Si9O27)2SiO]Cl·nH2O
Mohs
5
Reflected light photomicrograph showing petrographic aspects of studied specimens: ikunolite (Iku) as coarse laths within native bismuth. Mineral

Ikunolite

ikunolite

Formula
Bi4S3
Yellowish crystals of the rare manganese sulphate mineral ilesite in a matrix of white apjohnite from one of the few localities known worldwide for ilesite. From: Santa Ana Mine, Mazarron, Murcia, Spain. Mineral

Ilesite

ilesite

Formula
(Mn,Zn,Fe)SO4·4H2O
Mineral

Ilinskite

ilinskite

Formula
(Na,K)Cu5(SeO3)2O2Cl3
Mohs
1.5
Mineral

Ilirneyite

ilirneyite

Formula
Mg0.5ZnMn³⁺(Te4+O3)3·4.5H2O
Example of the paragenesis of illoqite-(Ce) with the brown ‘band’ running through the rock being weathered illoqite-(Ce). Ussingite (Usg) and chkalovite (Ckl) are marked respectively. 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

Illoqite-(Ce)

illoqite-(Ce)
Outstanding bright yellow crystals of the extremely rare mineral Ilmajokite-(Ce) from the type and only known locality worldwide in Rusia (Yubileinaya Pegmatite, Karnasurt Mountain, Lovozero Massif, Murmansk Oblast, Russian Federation) in a whitish contrasting matrix. Named for the Ilmajok River, Russia, located near the type locality. It was originally named simply ilmajokite and renamed in 2020 after new data showed a REE as a species-forming element. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Ilmajokite-(Ce)

ilmajokite-(Ce)

Formula
(Na,Ce,Ba)2TiSi3O5(OH)10·29H2O
Ilmenite Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada The ilmenite is ~ 8 mm wide. Found August 1998. Mineral

Ilmenite

ilmenite

Formula
Fe²⁺Ti⁴⁺O3
Mohs
5.5
Ilsemannite Locality: Mogul Tunnel Occurrence, Boulder County Tungsten District, Boulder County, Colorado, USA (Locality at mindat.org) Size: 6.0 x 3.8 x 2.7 cm. A very rich sample of fine blue Ilsemannite on matrix from the Mogul Tunnel in Boulder County, Colorado. There is some question as to whether or not this Molybdenum oxide is a valid species, but I cannot find anything in the current literature to say whether or not it is valid or discredited. Nonetheless, specimens of this material are not seen on the market in any quantity, and this is certainly one of the finest pieces that I know of from Boulder County. Ex. Richard Kosnar Collection. Mineral

Ilsemannite

ilsemannite

Formula
Mo3O8·nH2O (?)
Mineral

Iltisite

iltisite

Formula
HgAgSCl
Ilvaite, Quartz Locality: Serifos Island (Seriphos), Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon), Kykládes Prefecture, Aegean Islands (Aiyaíon) Department, Greece (Locality at mindat.org) Size: 3.9 x 2.1 x 1.8 cm. A classic and aesthetic ilvaite specimen from the old-world location of the Isle of Seiphos, Greece. This doubly terminated, floater crystal is very well formed, has excellent lustre, rich black color and is remarkable for size and perfection. The crystal has the classic, chisel termination and the embedded quartz crystals are a real highlight. Ex. Jaime Bird Collection. Mineral

Ilvaite

ilvaite

Formula
CaFe³⁺Fe²⁺2(Si2O7)O(OH)
Mineral

Ilyukhinite

ilyukhinite

Formula
(H3O,Na)14Ca6Mn2Zr3Si26O72(OH)2·3H2O
Brown crystal aggregates of the rare mineral illimaussite-(Ce) from the TL in Ilimaussaq (Ilímaussaq, Narsaq, Kujalleq, Greenland). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Ilímaussite-(Ce)

ilímaussite-(Ce)
Mineral

Imandrite

imandrite

Formula
Na12Ca3Fe³⁺2(Si6O18)2
Mineral

Imayoshiite

imayoshiite

Formula
Ca3Al(CO3)[B(OH)4](OH)6·12H2O
:Locality: Lengenbach Quarry, Binntal, Wallis, Switzerland Size: 1.7 × 1.5 × 0.8 cm Description: A really amaizing specimen of this rare talium species: imhofite. Bronze colored "book shape" tabular crystals perfectly disposed very aerial and contrasting with the white sugar dolomite matrix. It is acompanied by prismatic elongated brilliant red hutchinsonite crystals and yellowish orpiment. Lengenbach Official Number: L-22322. Find in 1990 (27 years ago!). The number of confirmed imhofite specimens until 2002 was only 120, and later grew to only 172 (Faszination Lengenbach, 2008). Lengenbach is the Type Locality and only two more localities are known worldwide. Mineral

Imhofite

imhofite

Formula
Tl5.8As15.4S26
Imiterite Locality: Imiter Mine, Boumalne-Dadès, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco (Locality at mindat.org) Picture width 0.6 mm. Collection and photograph Christian Rewitzer Mineral

Imiterite

imiterite

Formula
Ag2HgS2
Mohs
2.5
SEM image of synthetic imogolite nanotubes Mineral

Imogolite

imogolite

Formula
Al2SiO3(OH)4
Mineral

Inaglyite

inaglyite

Formula
Cu3Pb(Ir,Pt)8S16
Mineral

Incomsartorite

incomsartorite

Formula
Tl6Pb144As246S516
Inderborite Locality: Deposit No. 6, Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Oblysy (Atyrau Oblast'), Kazakhstan (Locality at mindat.org) Size: 11.4 x 6.6 x 6.6 cm. This is a museum-sized specimen of this rare borate, featuring thick, blocky, and really large crystals in the display face pocket. Mineral

Inderborite

inderborite

Formula
CaMg[B3O3(OH)5]2(H2O)4·2H2O
Colour
colorlessness, white
Inderite Locality: Boron, Kramer District, Kern Co., California, USA Size: 8.9 x 2.1 x 2.3 cm This is a superb, world class crystal of inderite, showing sharp form and a lack of alteration into chalky tincalconite so often seen in this material. Purchased from collector Ed Swoboda, in 1983, it is a superb, dramatic single crystal with a broad and perfect termination. Seldom seen on the market, today. Ex. Al Ordway Collection. Mineral

Inderite

inderite

Formula
MgB3O3(OH)5·5H2O
Mineral

Indialite

indialite

Formula
Mg2Al3(AlSi5O18)