Identify any rockfrom a photo.

Polished jasper pebble, likely mookaite or brecciated jasper

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions

Tumbled turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Micaceous schist (likely biotite schist)

Biotite–quartz–feldspar schist; commonly containing muscovite and/or garnet

Raw selenite (gypsum)

Gypsum, CaSO₄·2H₂O; transparent varieties are called selenite

Raw selenite (gypsum)

Gypsum, CaSO₄·2H₂O; transparent varieties are called selenite

Amethyst crystal point

Amethyst, purple quartz (SiO₂)

Polished amethyst crystal point

Amethyst, purple quartz (SiO₂)

Polished honey calcite point

Calcite (calcium carbonate, CaCO₃), likely honey/yellow calcite

Polished smoky quartz crystal point

Quartz (SiO₂), likely iron-colored or smoky quartz with milky inclusions

Iron-rich chondritic meteorite candidate

Unclassified stony meteorite; possible ordinary chondrite (H/L type)

Weathered dark volcanic rock, possibly basalt

Basalt (tentative; likely iron-rich mafic volcanic rock)

Pegmatitic granite

Granite/pegmatite; predominantly quartz (SiO₂), feldspar, and mica