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Unidentified Mineral Samples Subjected to Obervation and Experimentation

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Introduction In this lab, eight unidentified mineral samples are the subject of observation and experimentation. The purpose of this lab is to identify the samples based on the observations and experimentation. This paper will identify each of the samples and briefly discuss each one. Mineral A - Kaolinite Kaolinite, composed of hydrated aluminum silicate, is the result of “sedimentary rocks whose sediments were derived from weathered igneous and metamorphic rocks” (Schroeder, 2013). Much like talc, it is white in color. It differs from talc in that it has pale yellow coloring. Not quite as soft as talc, kaolinite scratches very easily. The uses for kaolinite include paper, ceramics and cosmetics. Mineral B - Olivine Olivine is not a single mineral but rather a mineral series. By definition, a mineral series contains multiple elements that have the ability to substitute for one another but leave the crystal structure intact in the process. “n olivine, iron (Fe) and magnesium (Mg) do this, so the Olivine Series has two end members. Favalite is the iron-rich version, while forsterite is the magnesium-rich version, although any combination of magnesium and iron is possible” (UM, n.d.). This sample much like quartz and its glass-like feel and appearance and difficulty to scratch, was easy to identify as not being quartz. The olive green color of this sample made it stand out from quartz. Gemstones and brick making are among the uses for olivine. Mineral C - Malachite Malachite with its green color, light green streak, dull appearance and ease in scratching all helped to identify this sample. The mineral is a copper carbonate mineral “that forms at shallow depths within the Earth, in the oxidizing zone above copper depo... ... middle of paper ... .... Hornblende. A common rock-forming mineral found in igneous and metamorphic rocks. Retrieved from http://geology.com/minerals/hornblende.shtml King, H. (2013). What is malachite? Retrieved from http://geology.com/minerals/malachite.shtml King, H. (2013). What is quartz? Retrieved from http://geology.com/minerals/quartz.shtml Schroeder, P. (2013). Kaolin. Retrieved from http://www.georgiaencyclopedia.org/articles/science-medicine/kaolin University of Auckland (UA). (2005). Magnetite. Retrieved from http://flexiblelearning.auckland.ac.nz/rocks_minerals/minerals/magnetite.html University of Minnesota (UM). (n.d.). Hematite. Oxides Mineral Class. Retrieved from http://www.geo.umn.edu/courses/1001/minerals/hematite.shtml University of Minnesota (UM). (n.d.). Olivine Group. Orthosilicate. Retrieved from http://www.geo.umn.edu/courses/1001/minerals/olivine.shtml
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