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Currently used for unidentified massive hydroxides and oxides of iron, with no visible crystals, and a yellow-brown streak. ... 'Limonite' is most commonly the mineral species Goethite, but can also consist of varying proportions of maghemite, hematite, lepidocrocite, hisingerite, pitticite, jarosite group species, etc.
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www.mindat.org/min-2402.html
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A group of triclinic and monoclinic micaceous minerals with a structure consisting of T-O-T layers with two layers having their silicate tetrahedral apices pointing towards each other, separated by an interlayer that may be simple octahedrally ... Search for - Chlorite Group - on e-Rocks Mineral Sales & Auctions...
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www.mindat.org/show.php?id=1016&ld=1
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Limonite facts ... What mineral group ... ... (lī'mə-nīt') n. Any of a group of widely occurring yellowish-brown to black iron oxide minerals, essentially FeO(OH)·nH2O, used as a minor ore of iron. [German Limonit, from Greek leimōn, meadow.];
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dictionary.reference.com/browse/limonite
dictionary.reference.com/browse/limonite
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Oxides : Goethite - lepidokrokite group ... The main ingredience in limonite. ... Mineral group index. ;
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www.geology.neab.net/minerals/goethite.htm
www.geology.neab.net/minerals/goethite.htm
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Quick Mineral Reference for Formula, Group, Class, Subclass, Type Locality, Obsolete Names from John Betts - Fine Minerals, mineral dealer in New York City. ... For each mineral species we have provided a quick reference of chemical formula, mineral group or mineral series, mineral class and, subclass, and the Dana locality...
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www.johnbetts-fineminerals.com/jhbnyc/referenc.htm
www.johnbetts-fineminerals.com/jhbnyc/referenc.htm
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Gold in its natural mineral form almost always has traces of silver, and may also contain traces of copper and iron. A Gold nugget is usually 70 to 95 percent gold, and the remainder mostly silver. The color of pure Gold is bright golden yellow, but the greater the silver content, the whiter its color is.
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www.minerals.net/mineral/elements/gold/gold.htm
www.minerals.net/mineral/elements/gold/gold.htm
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Gypsum Rock - Rock composed mostly of the mineral Gypsum, but also contain impurities such as Calcite, Anhydrite, Rock Salt, Dolomite, Limonite, and clay ... 1. Selenite crystal; 2. Brown crystal cluster; 3. Gypsum "Desert Rose"; 4. Group of fragile acicular crystals; 5. Platy rosette crystals; 6. Long, slender,
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www.minerals.net/mineral/sulfates/gypsum/gypsum.htm
www.minerals.net/mineral/sulfates/gypsum/gypsum.htm
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Sulfides, Arsenides, and Tellurides ... Ignaz von Born (1742-1791), mineralogist ... A. T. M. Brochant de Villiers (1731-1840), mineralogist...
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dph1701.tripod.com/geology/mineralnames_group.html
dph1701.tripod.com/geology/mineralnames_group.html
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Mineral - Wikipedia, the free encyclopedia
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A mineral is a naturally occurring solid formed through geological processes that has a characteristic chemical composition, a highly ordered atomic structure, and specific physical properties. A ro...
en.wikipedia.org/wiki/Mineral
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