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