Metals including molybdenite in quartz, dirty chromite with oxide of chrome, antimonite, pyrantimonite, arsenic, orpiment, realgar crystal, arsenite octahedrons and pharmakolite. Chromolithograph from Dr. Aldolph Kenngott's "Mineralogy" section in ...
Minerals | Free Full-Text | Exploratory Study of Separation of Sulphidised Chrome Spinels from Reduced Ilmenite