Identify any rockfrom a photo.

Blue-green agate bead bracelet

Chalcedony (microcrystalline quartz, SiO₂), likely dyed blue-green

Lapis lazuli bead bracelet

Lapis lazuli: a rock composed mainly of lazurite, with variable calcite and pyrite

Blue gemstone bead bracelet, likely dyed agate or another blue stone

Undetermined; possibly dyed chalcedony (microcrystalline quartz, SiO₂)

Pink-and-cream mineral bead bracelet (likely rose quartz and pale quartz)

Quartz, SiO₂; rose quartz is pink quartz, though the beads may include other pale stones.

Polished gemstone beads, likely brown tiger’s eye with an orange bead and a green bead

Tiger’s eye: fibrous quartz (SiO₂) with iron-oxide inclusions; the orange and green beads cannot be identified confidently from the image

Likely polished agate beads

Agate, a banded variety of chalcedony (microcrystalline SiO₂); exact identification is uncertain from the image

Multicolor quartz bead bracelet

Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz

Polished red gemstone beads, possibly garnet

Unconfirmed; likely almandine garnet (Fe₃Al₂(SiO₄)₃)

Pale blue-green fluorite (rough crystal)

Fluorite, calcium fluoride (CaF₂)

Polished agate slice

Chalcedony (microcrystalline quartz, SiO₂), likely a pale pink agate geode slice

Polished stone clock face, likely agate or jasper

Unconfirmed silica-rich material; possibly banded chalcedony (SiO₂)

Polished agate slice

Agate, a banded variety of chalcedony (microcrystalline SiO₂)