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Lab 3 - Cyclosilicates Tourmaline Topaz Beryl Beryl(variety...

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Lab 3 Part A Common Rock forming silicates (Mostly Igneous) Orthosilicates (Nesosilicates): Olivine: Forsterite & Fayalite Sodalite Inosilicates: Orthopyroxenes (Opx): Enstatite. Clinopyroxenes (Cpx): Augite, Spodumene. Amphiboles: Hornblende Phyllosilicates: Muscovite, Phlogopite, Biotite, Lepidolite, Astrophyllite (a double chain silicate!!!!) Tectosilicates: Quartz, Amethyst, Rose Quartz, Smoky Quartz Jasper, Chalcedony (Agate), Flint, Tiger’s eye (These varieties are not igneous!) Opal* Plagioclase Feldspars: Oligoclase, Labradorite K-Feldspars: Orthoclase, Microcline Feldspathoids: Nepheline Accessory Minerals: Orthosilicates : Zircon
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Unformatted text preview: Cyclosilicates : Tourmaline, Topaz, Beryl, Beryl (variety: emerald). Part B 1-How can you tell the following minerals apart: a-Amphiboles and Pyroxenes b-Plagioclase feldspars & K-feldspars c-Orthopyroxene (e.g. Enstatite or Hypersthene) and Clinopyroxene (e.g. augite). d-Nepheline and Orthoclase e-Topaz and Quartz 2-Identify specimens 1 through 10, listing the diagnostic property or properties that led you to this conclusion: 3-Investigate and summarize some of the industrial uses of Feldspars and Micas. 4-Give reasons for the color of (i) rose quartz, (ii) smoky quartz, and (iii) amethyst....
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