calcite
crystal
chalcedony
lazarite
leucite
lead
lapis lazuli
lignite
malachite
marble
marcasite
manganese nodules
magnetite
mica
mineral
mimetite
magnesite
pyrite
pyroxine
pearl spar
precious stone
topaz
turquoise
tourmaline
ulexite
ullmannite
uraninite
uranocircite
uranophane
uranopilite
uvarovite
uvite
variscite
volcanic block
vulganite