Open AccessGem-Quality Friedelite from the Kalahari Manganese Field Near Kuruman, South Africa
Author(s) -
Herbert S. Pienaar
Publication year - 1982
Publication title -
gems and gemology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.369
H-Index - 23
eISSN - 2376-4473
pISSN - 0016-626X
DOI - 10.5741/gems.18.4.221
Subject(s) - manganese , field (mathematics) , geology , geography , quality (philosophy) , earth science , materials science , physics , mathematics , metallurgy , quantum mechanics , pure mathematics