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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.
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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.
The petrological and mineralogical collections (7,463 specimens) are represented by the stones and minerals collected in Normandy and outside of the region. They include very rare and valuable types such as lazurite from Morocco, pink rhodochrosite from Argentina, black tourmaline from Madagascar, and green autunite from Haute Vienne.
Sun of May on the first Argentine coin, 1813. According to Diego Abad de Santillán, the Sun of May represents Inti, the Incan god of the sun. [1]The specification "of May" is a reference to the May Revolution which took place in the week from 18 to 25 May 1810, which marked the beginning of the independence from the Spanish Empire for the countries that were then part of the Viceroyalty of ...
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 ...
Patricia Bullrich, Argentina's security minister, is on a mission to stamp out drug gangs in the South American nation that have driven rising violence and led to a spike in cocaine shipments to ...
Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...