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Sample n° 10267

Minerals found in the sample
Mineral Formula Category Subcategory Importance
SCHORL NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) cyclosilicates tourmaline major
Description
Description: aggregates of bright black prismatic crystals (4 cm)
Origin
  • Country: Rwanda
  • Region: Ruhengeri
  • Locality: Nemba
Specification
  • Donors: Bertossa
    Donation year: 1963
  • Sampling year:
    Registration date:
  • Quantity: 2
    Size: 2
  • Dimension code 1>2>3: 3
    Quality code 1>2>3: 1
  • Holotype: no
    Paratype: no
    Radioactive: no
  • Thin section: no
    Chemical analysis: no
    X-Ray spectra: no
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