Mineral (Tectosilicate)

Granite (likely weathered, coarse-grained specimen)

Granite; chiefly quartz, feldspar, and mica

Serpentine (rough serpentine-rich rock)

Serpentine-group minerals, chiefly antigorite and/or lizardite; composition broadly Mg₃Si₂O₅(OH)₄

Granite

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

Chrysocolla-bearing copper ore (tentative)

Chrysocolla, a hydrated copper silicate; commonly intergrown with quartz and/or other copper minerals

Granite with Epidote

Granite, containing quartz, feldspar, and epidote

Banded Gneiss

Gneiss (Felsic to Mafic Metamorphic Rock)

Likely rough garnet

Garnet group, possibly almandine (Fe₃Al₂(SiO₄)₃); identification is uncertain from the image

Likely garnet crystal fragment

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

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)

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

Weathered granite

Granite, a quartz–feldspar–mica intrusive igneous rock

Iron-stained brown mineral/rock fragment

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

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)

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.

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

Rounded mixed-grain river pebble, likely granitic rock

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

Garnet in marble

Likely almandine or pyrope garnet (X₃Y₂(SiO₄)₃) in calcite marble; species cannot be confirmed from the image alone.

Granite

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

Banded Sedimentary Rock

Sedimentary rock with mineral veins/banding

Pegmatite

Igneous Pegmatite

Weathered granite

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

Banded gneiss

Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss

Chalcopyrite

Copper iron sulfide (CuFeS2)

Quartz-bearing pegmatitic rock with feldspar

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and mica

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Granitic Gneiss

Gneiss (Metamorphic Rock)