Mineral Side Rock

Sandstone

Arenite (typically SiO2 based)

Sandstone/Quartzite

Sedimentary Rock (composed mainly of SiO2)

Sandstone

Arenite (SiO2 based)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Arenite (SiO2 based)

Sandstone

Arenite (SiO2 principal)

Sandstone (Greywacke/Siltstone variant)

Arenite / Wacke (SiO2 with diverse mineral inclusions)

Sandstone (Pebble)

Arenite (SiO2 based)

Sandstone

Arenite (SiO2 based)

Sandstone

Arenite (SiO2 dominant)

Sandstone

Arenite

Sandstone Pebble

Arenite (SiO2 principal)

Gossanous Sandstone (likely Terrestrial)

Arenite with Iron-Oxide inclusions

Quartz-veined Sandstone Pebble

Quartzite-veined Arenite

Red Painted Rock

Artificial Coated Lithic Fragment

Graphic Granite (or Rapakivi-textured Granite)

Alkali feldspar granite

Sandstone (likely River-tumbled Picture Sandstone)

Arenite (predominantly SiO2 with iron oxide impurities)

Copper Ore (Malachite and Limonite bearing rock)

Copper-bearing rock with secondary copper minerals

Chrysocolla and Azurite in Matrix

Hydrated copper phyllosilicate (Chrysocolla - Cu2H2Si2O5(OH)4) and Copper carbonate (Azurite - Cu3(CO3)2(OH)2)

Quartz with Mafic/Chlorite Veins

Silicon Dioxide (SiO2) with Chlorite/Epidote cross-veining

Quartz (Druzy) in host rock

SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Diorite (Salt and Pepper Rock)

Diorite

Sandstone Pebble

Sedimentary Rock (Quartzose Sandstone)

River Stone (Sandstone with Oxide Banding)

Arenite with Iron/Manganese Oxide inclusions

Auriferous Quartz (Gold-bearing Quartz)

Silicon Dioxide (SiO2) with trace Gold (Au) and Iron Oxides

Chert Pebble

Chert (Microcrystalline Quartz, SiO2)

Polished brown mineral or rock fragment

Indeterminate from image; possibly iron-stained quartz, jasper, or a polished sulfide-bearing specimen

Wishing Stone (Basalt/Metabasalt with Quartz-Feldspar Vein)

Veined Metabasalt / Veined Greywacke

Red Sandstone

Arenite (primarily SiO2 with Fe2O3)

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4

Granite

Intrusive Igneous Rock

Sandstone (Iron-stained)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Unidentified rock fragments

Indeterminate; likely a weathered, iron-stained silicate rock

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Gabbro

Gabbro (Mafic Plutonic Rock)

Sandstone

Clastic Sedimentary Rock

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)

Quartz Geode

Silicon Dioxide (SiO2)

Red Sandstone

Arenite (SiO2 with Fe2O3)

Red Sandstone

Arenite (primarily Quartz with Iron Oxide coating)