Mineral, Part Of A Rock

Sandstone Pebble

Arenite (primarily Quartz, SiO2)

Sandstone

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Red)

Arenite (SiO2 with Fe2O3)

Sandstone (Ferruginous)

Arenite with Iron-oxide inclusions (SiO2 primarily)

Dalmatian Stone

Dalmatian Stone (a peralkaline igneous rock consisting of Feldspar, Quartz, and Arfvedsonite)

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Sandstone

Clastic Sedimentary Rock (composed primarily of Quartz, SiO2)

Sandstone

Arenite

Quartz

Silicon Dioxide (SiO2)

Tree Agate (also known as Dendritic Agate)

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

Pyrite in Matrix (Quartz/Schist)

Iron Sulfide (FeS2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz Point

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz Sphere

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO₂)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon dioxide (SiO2)

Sandstone (with prominent jointing/fractures)

Arenite (composed primarily of SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace titanium, iron, or manganese

Granite

Granite (a felsic intrusive igneous rock)

Yellow Jasper

Silicon Dioxide (SiO2)

Pegmatite

Coarse-grained Igneous Rock (Granitic Pegmatite)

Turquoise

Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Sandstone

Arenite (composed primarily of SiO2)

Quartz Druzy on Matrix (with Copper Mineralization)

Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Extrusive)

Limonite (Iron Ore)

Limonite; FeO(OH)·nH2O

Granite (specifically Pink or Alkali Feldspar Granite)

Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Ferruginous Sandstone

Sandstone (arenite) with Limonite/Goethite cement

Sandstone (Weathered)

Arenite (primarily SiO2)

Gneiss

Gneiss

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)

Turquoise

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

Breccia

Breccia - Clastic sedimentary rock

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (Sandstone)