Franklinite Magnetite Chromite Cuprite
Quartz Wad Opal Samarskite
Chalcedony Hematite Corundum Quartz
Pyrolusite Brookite Corundum Rutile
Iron Oxide Aluminium Oxide Galena Silicon Dioxide
Spinel Hematite Corundum Chalcedony
Brookite Wad Chalcedony Samarskite
Spinel Uraninite Brookite Rutile
Hematite Uraninite Spinel Rutile