Geographic Minerals

Langbeinite: Properties and Occurrences

Langbeinite: Properties and Occurrences

Langbeinite is a potassium magnesium sulfate mineral with the chemical formula K2Mg2(SO4)3. Langbeinite crystallizes in the isometric-tetartoidal system as transparent colorless or white with pale tints of yellow to green and violet crystalline masses. It is a unique source of plant nutrition sin.....

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Lanarkite: Properties and Occurrences

Lanarkite: Properties and Occurrences

Lanarkite is a mineral, a form of lead sulfate with formula Pb2(SO4)O. It is a mineral consisting of sulphate of lead, occurring either massive or in long slender prisms, of a greenish white or gray color. It was originally found at Leadhills in the Scottish county of Lanarkshire, hence the name......

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Labradorite: Properties and Occurrences

Labradorite: Properties and Occurrences

Labradorite is a Feldspar mineral (formula: [(Ca, Na)(Al, Si)4O8], which is the most abundant group of minerals that can be found in the earth’s crust. It is an intermediate to a calcic member of the plagioclase series and is most often found in mafic igneous rocks such as basalt, gabbro, and n.....

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Kunzite: Properties and Occurrences

Kunzite: Properties and Occurrences

Kunzite is a pink to lilac colored gemstone, a variety of spodumene with the color coming from minor to trace amounts of manganese. It is a member of the Silicates family. It is the pink to light purple gem variety of the mineral Spodumene. Kunzite was discovered in 1902 and was named after Georg.....

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Kerolite: Properties and Occurrences

Kerolite: Properties and Occurrences

Kerolite or Cerolite is a metamorphic nickel bearing phyllosilicate mineral variety of talc, can be seen as a mixture of serpentine and saponite as well. It has the formula:  (Mg, Ni)3Si4O10(OH)2·H2O. It is often considered as a talc variety and it was discredited 1979. It is a metamorphic nick.....

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Kyanite: Properties and Occurrences

Kyanite: Properties and Occurrences

Kyanite is an attractive mineral that has a near sapphire-like blue color in some, particularly nice specimens. It is naturally a blue aluminosilicate mineral, usually found in aluminum-rich metamorphic pegmatites and/or sedimentary rock. It is an aluminum silicate mineral, often occurring as lon.....

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Kutnohorite: Properties and Occurrences

Kutnohorite: Properties and Occurrences

Kutnohorite is a rare calcium manganese carbonate mineral with magnesium and iron that is a member of the dolomite group. It is a rare calcium manganese magnesium iron carbonate mineral with trigonal crystals, having a white, pink or brown color. It is a member of the dolomite group and is diffic.....

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Kurnakovite: Properties and Occurrence

Kurnakovite: Properties and Occurrence

Kurnakovite is a hydrated borate of magnesium with the chemical composition MgB3O3(OH)5·5H2O. This material consisting of hydrous borate of magnesium. It is a member of the inderite group and is a triclinic dimorph of the monoclinic inderite. The material is obtainable in large size, but softnes.....

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Kuratite: Properties and Occurrence

Kuratite: Properties and Occurrence

Kuratite, named for Dr. Gero Kurat (1938–2009), meteorite researcher and Curator of the Meteorite Collection at the Vienna Natural History Museum, was first recognized as a new mineral by the Commission on New Minerals, Nomenclature and Classification in 2014 from a small meteorite sample. The .....

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Kukharenkoite-(Ce): Properties and Occurrences

Kukharenkoite-(Ce): Properties and Occurrences

Kukharenkoite-(Ce) is a barium cerium fluoride carbonate mineral, formula Ba2CeF(CO3)3. It was identified from samples found in the Mont-Saint-Hilaire alkaline intrusive complex, Quebec, and the Khibiny Massif, Kola Peninsula, Russia. It was named for Russian mineralogist Alexander A. Kukharenko .....

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Krutovite: Properties and Occurrences

Krutovite: Properties and Occurrences

Krutovite is a cubic nickel diarsenide with a chemical composition of NiAs2 and a sulfur content of 0.02-0.34 weight percent. It is a cubic nickel diarsenide mineral. It is composed of nickel and arsenic with trace to minor amounts of cobalt, iron, copper, sulfur, and antimony. Krutovite has a hi.....

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Krut’aite: Properties and Occurrences

Krut’aite: Properties and Occurrences

Krut’aite (also spelled Krutaite) is a rare mineral with the formula CuSe2. It crystallizes in the cubic crystal system. It has no industrial use, but it is a prized collector’s item. It was first identified in Petrovice, Okres Žďár nad Sázavou, Czech Republic, which is the only k.....

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