Mineral Side Rock

Quartz crystal cluster, possibly iron-stained quartz

Quartz (silicon dioxide, SiO₂)

Golden Healer Quartz (Iron-Stained Quartz Cluster)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3/FeOOH)

Pink granite pebble

Granite, a coarse-grained felsic intrusive igneous rock

Banded Iron Formation (Fragment)

Banded Iron Formation (BIF)

Copper Ore / Altered Granodiorite

Cupriferous rock with silicate gangue

Red Sandstone

Clastic Sandstone (typically Quartz-rich with Iron Oxide)

Sandstone

Arenite

Likely banded gneiss

Quartz–feldspar–mica gneiss (tentative visual identification)

Weathered granite

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspars, and mica

Sandstone Pebble with Mineral Encrustation

Quartz Sandstone with Calcite/Halite Crust

Quartz Geode

Silicon Dioxide (SiO2)

Basalt with Quartz Vein

Mafic volcanic rock with hydrothermal SiO2 filling

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone with Iron Banding

Arenite with Hematite or Limonite staining (SiO2 with Fe2O3)

Weathered geode or vug-bearing rock

Likely a quartz- or calcite-lined geode/vug in a host rock; exact minerals cannot be confirmed from the image

Gravel or Crushed Stone

Fragmented Aggregate Stone

Granite (weathered cobble)

Granite; chiefly quartz, feldspar, and mica/amphibole

Granite pebble

Granite, chiefly quartz, feldspar, and mica

Likely granite pebble

Granite, a quartz–feldspar–mica intrusive igneous rock

Rock Specimen

Unclassified rock specimen

Quartz-rich rock, likely granite or quartz-bearing metamorphic rock

Undetermined; possibly granitic rock composed mainly of quartz and feldspar, with mica or other dark minerals

Granite

Granite, a felsic intrusive igneous rock composed chiefly of quartz, feldspar, and mica

Basalt with Xenolith

Extrusive Igneous Rock containing Mantle Xenolith

Small red-brown mineral or rock fragment

Unidentified; possibly iron-oxide-rich jasper, garnet, or weathered sulfide

Rounded granitic gneiss pebble

Quartz–feldspar–biotite gneiss (tentative; exact identification requires closer inspection)

Sandstone

Arenite (SiO2 dominant)

Rough garnet-bearing rock, likely almandine garnet in matrix

Almandine garnet, Fe₃Al₂(SiO₄)₃; exact host rock cannot be determined from the image

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Vuggy Quartz on Matrix

Crystalline Silicon Dioxide (SiO2)

Geode (Quartz / Chalcedony Geode)

SiO2 (Silicon Dioxide)

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

Gneiss (rounded cobble)

Quartz–feldspar–mica gneiss; exact mineral proportions cannot be determined from the image

Sandstone with Manganese Dendrites

Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)

Sandstone

Arenite (primarily SiO2)

Shale

Laminated Mudstone (Shale)

Red Sandstone

Arenite (primarily quartz with iron oxide cement)

Fluorite

Fluorite (Calcium Fluoride - CaF2)

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Possibly garnet-bearing rock fragment

Unidentified reddish-brown mineral or rock; the image is insufficient for a reliable species identification.

Sandstone (Iron-stained)

Arenite with Limonite/Hematite staining

Sandstone

Arenite (primarily SiO2)

Serpentinite

Serpentinite, a rock composed mainly of serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄)