Mineralogy Database

2 samples matching your criteria

• Sample n°5473 : olive-green rock with conchoidal fracture
  Minerals: OPAL

  Year: 1953

  Country: Congo (RDC)
• Sample n°5475 : reniform concretion and coral-like aggregates in basaltic tuff
  Minerals: OPAL

  Year:

  Country: Congo (RDC)