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Sample n° 1093

Minerals found in the sample
Mineral Formula Category Subcategory Importance
SCHORL NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) cyclosilicates tourmaline major
Description
Description: bundles of black prismatic crystals in tourmalinite
Origin
  • Country: Rwanda
  • Region: Byumba
  • Locality: Lugarama, Bujumu, Kuluti
Specification
  • Donors: Kostka
    Donation year: 1938
  • Sampling year:
    Registration date:
  • Quantity: 1
    Size: 2
  • Dimension code 1>2>3: 2
    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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