Mineral, Specifically A Rock Fragment

Sandstone

Arenite (SiO2 based with various mineral cements)

Sandstone

Arenite (Clastic Sedimentary Rock)

Quartz-veined Sedimentary Rock

Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Basalt (Vesicular)

Basalt (Mafic Extrusive Igneous Rock)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Quartz (specifically Milky or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Sandstone (Quartzite Pebble)

Arenite (SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (Red)

Arenite (Fe2O3 heavy)

Sandstone (likely Arkosic or Quartzose)

Sandstone (SiO2 dominated)

Sandstone

Arenite (primarily SiO2)

Sandstone (Quartz-rich)

Arenite (SiO2)

Sandstone

Arenite (SiO2 based typically)

Sandstone (Quartzose Sandstone)

Arenite (SiO2 primarily)

Sandstone

Arenite (predominantly SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Weathered Pebble)

Arenite (composed primarily of SiO2)

Sandstone (with Lichen)

Arenite (primarily SiO2)

Sandstone (likely Arkosic or Quartzose)

Arenite (SiO2 based with mineral inclusions)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Sandstone

Arenite (primarily Quartz, SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Sandstone (Calcareous Sandstone)

Calcareous Sandstone (primarily SiO2 with CaCO3 cement)

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Pink Granite

Granite (Felsic Plutonic Rock)

Sandstone (Ferruginous)

Arenite (Fe2O3 stained)

Mookaite Jasper

Silicified Radiolarite (Silicon Dioxide: SiO2)

Sandstone (Pebble)

Arenite (composed primarily of SiO2)

Granite (Pink/Potassium Feldspar Granite)

Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Gemstone Sand (Mineral Assortment)

Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)

Sandstone Pebble with Iron Staining

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

Sandstone (with Limonite staining)

Arenite (primarily SiO2 with FeO(OH)·nH2O)

Sandstone

Arenite (SiO2 based with various mineral cements)