Oxides and Hydroxides
4th class - Oxides and hydroxides. They consists of oxides and hydroxides of metals and nonmetals. Their categorization is based on the metal/oxygen ratio. The hydroxides are classificed mainly on the basis of the presence of OH and/or H2O. Also arsenides (AsO3), selenides (SeO3), tellurides (TeO3) and iodides (IO3) belong to this class.
List of exhibitskřemen, jeden kus /18x12cm/ g9005záhněda, jeden kus /8x7cm/ g9054 záhněda, jeden kus /13x12cm/ g9058 křemen, jeden kus /23x13cm/ g9120 růženín, jeden kus /31x20cm/ g9121  opál, stanin, jeden kus /21x14cm/ g9127 záhněda, jeden kus /22x10cm/ g9090 sametka /göethit/, jeden kus /18x9cm/ g9132 wolframit, jeden kus /11x7cm/ g8700 kassiterit, jeden kus /9x8cm/ g8701 sférosiderit, jeden kus /7x5cm/ g8709 psilomelan, jeden kus /7x5m/ g8606 ametyst, jeden kus /8x5cm/ g8607 opál, jeden kus /10x6cm/ g8610 uraninit, jeden kus /7x5cm/ g8742 psilomelan, jeden kus /8x4cm/ g8749 křemen, jeden kus /9x5cm/ g8906 křemen, jedenn kus /11x7cm/ g8913 křemen, jeden kus /12x9cm/ g8918 kuprit, malachit, chrysokol, jeden kus /9x8cm/ g8934
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Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]