Mineralogy Database

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Sample n° 15784

Minerals found in the sample
Mineral Formula Category Subcategory Importance
OPAL SiO2•nH2O tektosilicates - major
Description
Description: massive, with waxy lustre (var. hyalite)
Origin
  • Country: USA
  • Region: California
  • Locality:
Specification
  • Donors: Errera
    Donation year:
  • Sampling year:
    Registration date:
  • Quantity: 1
    Size:
  • Dimension code 1>2>3: 3
    Quality code 1>2>3: 3
  • Holotype: no
    Paratype: no
    Radioactive: no
  • Thin section: no
    Chemical analysis: no
    X-Ray spectra: no
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