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Mineralati

Minerals

6323 results

Mineral

Kopylovite

kopylovite

Formula
K2Ti(Si3O9)
Mineral

Koragoite

koragoite

Formula
(Mn²⁺,Fe³⁺)3(Nb,Ta,Ti)2(Nb,Mn)2(W,Ta)2O20
Mineral

Koritnigite

koritnigite

Formula
Zn(AsO3OH)·H2O
Mineral

Kornelite

kornelite

Formula
Fe2(SO4)3 * 7H2O
The bladed mineral is kornerupine, Mg(Mg,Fe,Al)9(Si,Al,B)5O21(O,OH,F). It is in a sea of quartz that also contains small equant dark red garnets. Kornerupine is a rare mineral, sometimes prized as a gemstone (when it has an emerald green color). This sample from Waldheim, Germany, is about 5 cm across. Mineral

Kornerupine

kornerupine

Formula
Mg3Al6(Si,Al,B)5O21(OH)
Korobitsynite Field of view: 2 mm Locality: Alluaiv Mountain (TL), Lovozersky District, Murmansk Oblast, Russia Mineral

Korobitsynite

korobitsynite

Formula
(Na,☐)4Ti2(Si4O12)(O,OH)2·4H2O
Outstanding white acicular crystals of the extremely rare magnesium chloride mineral korshunovskite from the type locality (Korshunovskoje, Siberia, Russian Federation) and only one of the three known localities worldwide. Mineral

Korshunovskite

korshunovskite

Formula
Mg2Cl(OH)3·4H2O
The type specimen of heimaeyite. Heimaeyite is found in the vesicular light part of the sample, intimately mixed with koryakite and a mineral with a composition of NaMgAl(SO4)3. They are surrounded by a red mixture of anhydrite and hematite. Mineral

Koryakite

koryakite

Formula
NaKMg2Al2(SO4)6
Colorless and white crystal aggregates of the very rare Ca borate mineral korzhinskite from the type and only known locality worldwide: Novofrolovskoye Deposit, Turjinsk, Turya River, Krasnotur'insk, Sverdlovsk Oblast, Russian Federation. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Korzhinskite

korzhinskite

Formula
Ca(B2O4) * H2O
Kosmochlor jade ("maw sit sit") (8.0 cm across along the base) from the Hpakan-Tawmaw Jade Tract (near-latest Jurassic, 147 m.y.) of northern Burma. Maw sit sit is a very rare, complex, polymineralic metamorphic rock. Minerals reported in this material include chromite (metallic black, FeCr2O4), kosmochlor pyroxene (emerald green to dark green to black, NaCrSi2O6), chromian jadeite pyroxene (green, Na(Al,Fe,Cr)Si2O6), chromiferous arfvedsonite amphibole (green or gray, Cr-bearing NaNa2Fe5Si8O22(OH)2), symplectite (green, a finely-crystalline mineral mix of mostly chromian jadeite). Reported matrix minerals include thompsonite zeolite, albite feldspar, or serpentine. Maw sit sit formed under high pressure and low temperature conditions at the rim of serpentinized, chromiferous mantle peridotites. The peridotites were emplaced by obduction as oceanic lithosphere was subducting beneath the Burmese portion of southeastern Asia during the Mesozoic. Geologic unit: northeastern end of the Hpakan-Tawmaw Jade Tract, Hpakan Ultramafic Body, Naga-Adaman Ophiolite. Metamorphic age: late Tithonian Stage, near-latest Jurassic, 147 m.y. Locality: apparently an alluvial clast derived from the Namshamaw Deposit ("Namshamaw Dike"; "Maw Sit Sit Vein") at Maw Sit Sit, just northwest of Namshamaw, near Kansi (Kanzi), western Kachin State, Indo-Burma Range, northern Burma. Photo from & info. synthesized by James St. John (School of Earth Sciences, Ohio State University at Newark; Newark, Ohio, USA). Mineral

Kosmochlor

kosmochlor

Formula
NaCrSi2O6
Mohs
6
Kosnarite Locality: Jenipapo district, Itinga, Jequitinhonha valley, Minas Gerais, Southeast Region, Brazil (Locality at mindat.org) Size: 9.1 x 6.1 x 2.6 cm. Kosnarite is Potassium, Zirconium Phosphate and was named after Richard Kosnar in 1994. The type locality for this material is Mt. Mica, Maine, and the crystals at that find barely approached 1 mm in diameter. A few years ago, Luiz Menezes made a discovery of what are the finest crystallized Kosnarite specimens in existence with crystals up to 4 mm (which is a quantum leap in size)! This is a specimen from that find featuring sharp, lustrous, yellow color, pseudo-cubic (trigonal) crystals with brownish Muscovite on white Albite matrix. If you look closely, you'll see a small truncated face on each "cube" of Kosnarite on this specimen, which is actually a pinacoid or a "c" face as these crystals are trigonal and not isometric as they might appear. The quality on this specimen is as good as Kosnarite gets from any locality in the world. Ex. Richard Kosnar Collection. Mineral

Kosnarite

kosnarite

Formula
KZr2(PO4)3
Mohs
4.5
Exhibition of Kostovite in the National Natural History Museum, Sofia, Bulgaria Mineral

Kostovite

kostovite

Formula
AuCuTe4
Very rare K-Zr silicate specie Kostylevite in association with a Na-Y-Zr silicate Sazykinaite-(Y). Kostylevite forms colourless to cream coloured crystals. From Koashva Mountain, Khibiny Massif, Kola, Russian Federation. Mineral

Kostylevite

kostylevite

Formula
K2Zr(Si3O9) * H2O
Kotoite, Ludwigite, Szaibélyite (Specimen size: 6.5 x 4.5 x 2.5 cm) Locality: Nalednoe B Deposit, Tas-Khayakhtakh Range, Dogdo River Basin, Polar Yakutia, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia Original description: Massive coarse-crystalline aggregate of light-grey Kotoite, formed during reaction of B-bearing solutions with layer of pure magnesite. Associating minerals are black fibrous primary Ludwigite and whitish earthy alteration crust (at right) of secondary Szaibelyite. Collected by Nikolai N. Pertsev. Pavel M. Kartashov collection and photo. Mineral

Kotoite

kotoite

Formula
Mg3(BO3)2
Mohs
6.5
White acicular and fibrous kottenheimite. Analyzed sample from the Bernd Ternes collection. From: Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany. Mineral

Kottenheimite

kottenheimite

Formula
Ca3Si(SO4)2(OH)6·12H2O
Metallic inclusions of the extremely rare palladium mineral kotulskite from the Canadian locality of Vermilion Mine (Denison, Sudbury District, Ontario, Canada). Mineral

Kotulskite

kotulskite

Formula
Pd(Te,Bi)
Bluish grey crystal aggregates of the very rare Cu arsenide mineral koutekite. From: Mohawk Mine, Mohawk, Keweenaw County, Michigan, United States of America. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Koutekite

koutekite

Formula
Cu5As2
Kovdorskite Locality: Kovdor Mine, Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia (Locality at mindat.org) This cluster of cream-colored kovdorskite on matrix comes from the huge alkali massif on the Kola Peninsula. The longest crystal is almost 2 cm and the crystals exhibit a glassy luster. This recently defined rare species (10 years old) does occasionally come in faint blue and pink crystals, but they are very rare. THis comes from a later pocket found about 6 years ago, which produced these exceptional matrix specimens richly covered in crysatls and among the most densely crystallized examples of the species. It is quite nice for the size, and somewhat more aesthetic in person. 3.9 x 5.2 x 3.2 cm Mineral

Kovdorskite

kovdorskite

Formula
Mg2PO4(OH)·3H2O
Mineral

Kozoite-(La)

kozoite-(La)

Formula
(La,Nd)(CO3)(OH)
Mineral

Kozoite-(Nd)

kozoite-(Nd)

Formula
(Nd,La,Sm,Pr)(CO3)(OH)
(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

Kozyrevskite

kozyrevskite

Formula
Cu4O(AsO4)2
Mineral

Kozłowskiite

kozłowskiite
Pale brown radial crystal aggregates of the very rare mineral kraisslite from the type and only known locality worldwide in Sterling Hill (Sterling Hill, Ogdensburg, Sussex County, New Jersey, United States of America). Ex Vandenbroucke Museum collection specimen, from Waregem, Belgium. Mineral

Kraisslite

kraisslite

Formula
Zn3(Mn,Mg)25(Fe³⁺,Al)(As³⁺O3)2[(Si,As5+)O4]10(OH)16
Mineral

Krasheninnikovite

krasheninnikovite

Formula
KNa2CaMg(SO4)3F
Colour
colorless, white