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lecture 3 - Graphite C submetallic Galena PbS metallic Gold...

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9/11/10
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9/11/10 Graphite, C, submetallic Galena, PbS, metallic Gold, Au, splendent metallic
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9/11/10 Pyrite, FeS Copper, Cu Magnetite, Fe3O4 Hematite, Fe2O3 Silver, Ag
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9/11/10 VITREOUS LUSTER, quartz SiO2, like glass ADAMANTINE LUSTER- like diamond, C, sapphire Al2O3, has a sparkle
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9/11/10 WAXY LUSTER -sphalerite, ZnS RESINOUS LUSTER-like amber or grossular garnet (Ca-rich endmember)
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9/11/10 PEARLY LUSTER (talc, Mg3Si4O10(OH)2)                                                                                                                                              SILKY LUSTER (gypsum, CaSO4 2(H2O))
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9/11/10 GREASY LUSTER (serpentine, (Mg, Fe)3Si2O5(OH)4) Atacamite, Cu2Cl(OH)3
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9/11/10 EARTHY LUSTER (barite, BaSO4 or limonite, FeO(OH)·nH2O) Barite roses
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9/11/10 TRANSPARENT OPAQUE Rose quartz Calci te turquoise hematite TRANSLUC ENT Appears black under a microscope
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9/11/10 Precious opal; Play of colors
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9/11/10
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9/11/10 Fig.
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