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Materials of pietra dura artistic technique: composition, properties, provenance and possible identification
Jaroměřský, Štěpán ; Přikryl, Richard (advisor) ; Kuchařová, Aneta (referee)
Pietra dura or Florentine mosaic is a method of assembling thin slices of variously colored minerals and rocks into meaningful patterns or scenes. This artistic technique experienced a significant flourishing in Rudolfine Prague, where many works were created by this technique with materials that have not been described in detail yet. Although decorative carbonate rocks are frequently found in works made by the technique of pietra dura, decorative siliceous materials of jasperoid character, colored red, ochre or green, are equally important. This diploma thesis deals with the mineralogical and material research of these siliceous materials. One of the main objectives of the thesis was to explore possible discriminatory characteristics of siliceous materials from Czech localities, especially from the Kozákov area, which is historically documented as a deposit of jasperoid materials since at least the 16th century. The focus of the thesis lies in a set of mineralogical-petrographic and analytical methods of research. Using optical microscopy, scanning electron microscopy with energy dispersive spectroscopy, powder X-ray diffraction, Raman spectroscopy, Mössbauer spectroscopy and observation in ultraviolet light, it was possible to determine the minerals contained in the studied jasperoid materials....
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Characteristics of garnets from the locality Dolní Olešnice and problematics of their source rocks
Jaroměřský, Štěpán ; Matějka, Dobroslav (advisor) ; Hanus, Radek (referee)
Pyrope is one of the representatives of the garnet supergroup, which are known for their use in jewellery and have a rich history in the Czech Republic. However, despite their long-term use, a part of the supergroup is still unexplored and the source rock is unclear at some localities, which makes it difficult to explain the development of the deposit and the formation of surrounding geological units. This bachelor thesis describes pyrope as a Czech garnet and summarizes views on the issue of its primary source rock in the Czech Republic. This thesis also deals with characterizing of pyropes from the locality of Dolní Olešnice and discusses their primary source rock, the geological situation of the surrounding area, the method of mining and the minerals of the heavy fraction. Based on the study of available literature, a wealth of information about the pyropes from Dolní Olešnice was gathered, which could be the basis for further more detailed research of the area and the localisation of the pyrope source rock here. A geochemical heavy minerals prospecting was also carried out on the site to assess the quality of the pyrope drifting ability for several recommended flows in the area. Key words: garnets, garnet supergroup, pyrope, Dolní Olešnice, Podkrkonoší, mining, geochemical heavy minerals...
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