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Sample n° 12817

Minerals found in the sample
Mineral Formula Category Subcategory Importance
RIEBECKITE [ ]Na2(Fe2+3Fe3+2)Si8O22(OH)2 inosilicates amphiboles major
QUARTZ SiO2 tektosilicates - minor
Description: tiger's eye (silicified crocidolite) (15 cm)
Country: South Africa       Region: Northern Cape       Locality: Niekerkshoop
Donors Verwoerd Sampling year
Donation year 1972 Registration date
Quantity 1 Dimension code 1>2>3 2
Size 2 Quality code 1>2>3 1
Holotype no Thin section no
Paratype no Chemical analysis no
Radioactive no X-Ray spectra no