Mineral Composite

Granite (likely)

Granite, a quartz–feldspar–mica intrusive igneous rock

Banded river pebble, likely gneiss

Foliated quartz–feldspar rock, possibly banded gneiss

Granite

Felsic intrusive igneous rock

Likely garnet crystal fragment

Garnet-group mineral, possibly almandine (Fe₃Al₂(SiO₄)₃)

Blue Apatite

Apatite (Ca5(PO4)3(F,Cl,OH))

Weathered granite boulder

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

Mica Schist

Metamorphic rock dominated by micas (muscovite, biotite)

Bauxite

Hydrated aluminum oxides (mixture of gibbsite, boehmite, and diaspore)

Bauxite

Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Likely garnet (rough crystal)

Garnet group; possibly almandine, (Fe₃Al₂(SiO₄)₃)

Likely garnet crystal

Garnet-group silicate; species cannot be determined from the image

Blue-gray mineral specimen (possibly sodalite)

Undetermined; appearance may be consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), but the image is insufficient for reliable identification

Iron-stained brown mineral/rock fragment

Most likely limonite/goethite-rich material (hydrated iron oxides), possibly weathered ironstone; exact identification requires testing

Serpentinite (likely)

Serpentinite, composed mainly of serpentine-group minerals such as antigorite, lizardite, or chrysotile

Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Potassium Feldspar (Orthoclase)

KAlSi3O8 (Potassium Aluminum Silicate)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Quartz-rich rock, likely milky quartz vein material

Quartz (SiO₂), possibly with iron-oxide staining and minor associated minerals

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Orthoclase Feldspar with Quartz

Orthoclase (KAlSi3O8)

Dalmatian Jasper

Microcrystalline Quartz with Arfvedsonite and Tourmaline

Tumbled garnet-bearing rock (possible almandine garnet)

Likely almandine garnet, Fe₃Al₂(SiO₄)₃, in a dark host rock; identification is uncertain from the image alone.

Granite

Felsic intrusive igneous rock

Granite

Intrusive igneous rock

Granite

Felsic intrusive igneous rock

Granite

Felsic intrusive igneous rock

Sandstone

Sedimentary Arenite

Orange Calcite (likely polished specimen)

Calcite

Sedimentary Sandstone with Iron Oxide

Ferruginous Sandstone

Limonite

FeO(OH)·n(H2O)

Pyrite

Iron Sulfide (FeS2)

Yooperlite (Sodalite-bearing Syenite)

Sodalite-rich Syenite

Gneiss with Quartz Veining

Gneiss (High-grade Metamorphic Rock)

Weathered feldspar-rich pegmatite (likely orthoclase or plagioclase)

Granitic pegmatite; predominantly K-feldspar/plagioclase (KAlSi₃O₈–NaAlSi₃O₈), with quartz and dark mafic minerals

Granite

Felsic intrusive igneous rock

Granite

Granite

Sandstone

Clastic Sedimentary Rock

Rounded mixed-grain river pebble, likely granitic rock

Granite (tentative; exact rock type cannot be confirmed from the photograph)