Mineralogy Database

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19 samples matching your criteria

  • Sample n°13430 : large clear crystals
    Minerals: GYPSUM
    Year: 1976
    Country: Madagascar
  • Sample n°13439 : red block with conchoidal fracture, var. jasper
    Minerals: QUARTZ
    Year: 1976
    Country: Madagascar
  • Sample n°13445 : concretion
    Minerals: CHALCEDONY (quartz)
    Year: 1976
    Country: Madagascar
  • Sample n°13724 : block of white fibres (5 cm)
    Minerals: ASBESTOS
    Year: 1980
    Country: Madagascar
  • Sample n°13809 : black crystal, cleavage
    Minerals: COLUMBITE TANTALITE
    Year: 1980
    Country: Madagascar
  • Sample n°13894 : geode (10 cm), with some small black goethite crystals
    Minerals: GOETHITE AMETHYST (quartz)
    Year: 1981
    Country: Madagascar
  • Sample n°13897 : black crystals composed of stacked lamellae (4 cm)
    Minerals: BIOTITE ANHYDRITE CALCITE PYRITE
    Year: 1981
    Country: Madagascar
  • Sample n°18666 : fragments
    Minerals: CELESTINE
    Year:
    Country: Madagascar
  • Sample n°20139 : crystal intergrowths
    Minerals: COLUMBITE TANTALITE
    Year: 2023
    Country: Madagascar
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