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Sample n° 11553

Minerals found in the sample
Mineral Formula Category Subcategory Importance
TOURMALINE (Na,Ca)(Mg,Fe,Al)3(Al,Fe,Mg)6(BO3)3Si6O18(OH)4 cyclosilicates tourmaline major
Description: broken and corroded black crystal (7 cm)
Country: Congo (RDC)       Region: Orientale       Locality: Mambasa, Senguli
Donors Smith Sampling year
Donation year 1968 Registration date
Quantity 1 Dimension code 1>2>3 3
Size 2 Quality code 1>2>3 1
Holotype no Thin section no
Paratype no Chemical analysis no
Radioactive no X-Ray spectra no