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