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Sample n° 13874
Minerals found in the sample
Mineral | Formula | Category | Subcategory | Importance |
---|---|---|---|---|
BERYL | Be3Al2Si6O18 | cyclosilicates | - | major |
PYROLUSITE | MnO2 | oxides and hydroxides | - | minor |
Description
Description:
earthy hexagonal prismatic crystal (12 cm) with black spots
Origin
- Country: Portugal
- Region: Mangualde
- Locality:
Specification
-
Donors: DeliensDonation year: 1980
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Sampling year:Registration date:
-
Quantity: 1Size: 2
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Dimension code 1>2>3: 2Quality code 1>2>3: 1
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Holotype: noParatype: noRadioactive: no
-
Thin section: noChemical analysis: noX-Ray spectra: no