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Rhodochrosite is a manganese carbonate mineral with chemical composition MnCO 3. In its pure form (rare), it is typically a rose-red colour, [ 5 ] but it can also be shades of pink to pale brown. It streaks white, [ 6 ] and its Mohs hardness varies between 3.5 and 4.5.
The name is derived from the Greek "rhodon" for "rose-like", in common with other pink mineral types (such as rhodochrosite, rhodonite). This coloration, and the commonly inclusion-free nature of garnet from this locality, has led to rhodolite being used as a gemstone. Rhodolite like other varietal names is not officially recognized as a ...
Zinc, magnesium, and manganese commonly substitute for the iron, resulting in the siderite-smithsonite, siderite-magnesite, and siderite-rhodochrosite solid solution series. [3] Siderite has Mohs hardness of 3.75 to 4.25, a specific gravity of 3.96, a white streak and a vitreous lustre or pearly luster.
Manganese carbonate occurs naturally as the mineral rhodochrosite but it is typically produced industrially. It is a pale pink, water-insoluble solid. Approximately 20,000 metric tonnes were produced in 2005. [3] ==Structure and production==,
Sweet Home Rhodochrosite, Royal Ontario Museum "Alma King", the largest known rhodochrosite crystal, from the Sweet Home Mine. It measures 14 cm x 16.5 cm. [1] Sweet Home Mine is a mine near Alma, Colorado, United States. It was founded in 1873 as a silver mine. [2]
Rhodonite is a manganese inosilicate, with the formula (Mn, Fe, Mg, Ca)SiO 3, and member of the pyroxenoid group of minerals, crystallizing in the triclinic system. It commonly occurs as cleavable to compact masses with a rose-red color (its name comes from Ancient Greek ῥόδον (rhódon) 'rose'), often tending to brown due to surface oxidation.
Gemstones include rubies, diamonds, rhodochrosite, opal, emerald, and amethyst among others. [2] [4] [17] [24] Fossils include shark teeth, coprolites, or fossilized dung, petrified wood, dinosaur eggs, trilobites, and a baby dinosaur of the genus Psittacosaurus. [7] [19] Around 1,000 of the specimens at the museum are only viewable using a ...
Rhodochrosite, by JJ Harrison (from Wikipedia:Featured pictures/Sciences/Geology) Blairmorite, by Paul Glombick (edited by ...
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