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Sample n° 6616
Minerals found in the sample
Mineral | Formula | Category | Subcategory | Importance |
---|---|---|---|---|
TOPAZ | Al2SiO4F2 | nesosilicates | - | major |
Description
Description:
yellow prismatic crystals (2 cm)
Origin
- Country: Brazil
- Region: Minas Gerais
- Locality: Ouro Preto
Specification
-
Donors: de AlmeidaDonation year: 1955
-
Sampling year:Registration date:
-
Quantity: 8Size: 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