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Almandine (/ ˈ æ l m ən d ɪ n /), also known as almandite, is a species of mineral belonging to the garnet group. The name is a corruption of alabandicus, which is the name applied by Pliny the Elder to a stone found or worked at Alabanda, a town in Caria in Asia Minor. Almandine is an iron alumina garnet, of deep red color, inclining to ...
Colemanite is a secondary mineral that forms by alteration of borax and ulexite. [ 3 ] It was first described in 1884 for an occurrence near Furnace Creek in Death Valley and was named after William Tell Coleman (1824–1893), owner of the mine "Harmony Borax Works" where it was first found. [ 4 ]
It was founded in 1959 to coordinate the assigning of new mineral names, revision of existing names and discreditation of invalid species. Traditionally, the validation procedure of new minerals is one of the chairman's tasks and the discreditation or revalidation procedure of invalid species are two of the vice-chairman's tasks.
Any one mineral may be dominant, and this, together with the two or three other major minerals present, suffices to determine the petrographic name. The presence of the following minerals precludes a rock from being classified as a lamproite: primary plagioclase , melilite , monticellite , kalsilite , nepheline , Na-rich alkali feldspar ...
The minerals present in a granulite will vary depending on the parent rock of the granulite and the temperature and pressure conditions experienced during metamorphism. A common type of granulite found in high-grade metamorphic rocks of the continents contains pyroxene , plagioclase feldspar and accessory garnet , oxides and possibly amphiboles .
The collection is older than the building. It began in 1625, when minerals with medicinal properties were deposited in le droguier du roi ('the royal drug cabinet'). Thereafter, the droguier and its minerals were moved to the Jardin royal des plantes médicinales ('Royal Garden of the Medicinal Plants'), founded in 1635 under the rule of Louis ...
Goethite (/ ˈ ɡ ɜːr t aɪ t /, [6] [7] US also / ˈ ɡ oʊ θ aɪ t / [8] [9]) is a mineral of the diaspore group, consisting of iron(III) oxide-hydroxide, specifically the α-polymorph. It is found in soil and other low-temperature environments such as sediment.
Serpentine minerals are polymorphous, meaning that they have the same chemical formulae, but the atoms are arranged into different structures, or crystal lattices. [7] Chrysotile , which has a fibrous habit , is one polymorph of serpentine and is one of the more important asbestos minerals.