Mineralogy Database

2 samples matching your criteria

• Sample n°10848 : long black striated needles in gold-bearing quartz
  Minerals: TOURMALINE QUARTZ

  Year: 1933

  Country: Congo (RDC)
• Sample n°10863 : bright black coating on vein quartz
  Minerals: GRAPHITE QUARTZ

  Year: 1930

  Country: Congo (RDC)