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Jak szlifowac nigeryjskie klejnoty

Jak szlifowac nigeryjskie klejnoty


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About the Book

Książka ta analizuje różne raporty geologiczne dotyczące geologii nigeryjskiej, które wskazują, że kamienie szlachetne występują we wszystkich jednostkach geologicznych Nigerii. Szafir i szmaragd są uznanymi kamieniami szlachetnymi, podczas gdy termaliny, ametyst, topaz, cyrkon, granat i akwamaryn stanowią powszechne kamienie pólszlachetne w Nigerii. Ich zasoby nie są jednak dobrze znane z powodu niesystematycznych poszukiwań. Ponad 90% nigeryjskich kamieni szlachetnych jest nielegalnie eksportowanych i pozyskiwanych w sposób nieprzyjazny dla środowiska naturalnego.Obecnie w kraju istnieje tylko jeden lapidarium znajdujący się w Jos. Wielu Nigeryjczyków stac na lupę, filtr i dychroskop, a także na bieglośc w identyfikacji klejnotów. Po kilku miesiącach treningu, Nigeryjczycy mogą stac się wykwalifikowanymi lapidarystami. Przetwarzanie klejnotów obejmuje: pilowanie, wykonywanie, doping, kalibrowanie, fasetowanie i polerowanie. W Nigerii wycina się i poleruje gruszkę, okrągly, ośmiokątny, kwadratowy, owalny, markizowy, trójkątny i sercowy o różnych rozmiarach, a na calym świecie rośnie zapotrzebowanie na szlifowane i polerowane klejnoty nigeryjskie, które mają wiele zastosowań.


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Product Details
  • ISBN-13: 9786202902441
  • Publisher: KS Omniscriptum Publishing
  • Publisher Imprint: Wydawnictwo Nasza Wiedza
  • Height: 229 mm
  • No of Pages: 80
  • Spine Width: 5 mm
  • Width: 152 mm
  • ISBN-10: 6202902442
  • Publisher Date: 14 Jan 2021
  • Binding: Paperback
  • Language: Polish
  • Returnable: N
  • Weight: 177 gr


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