Metamorphic Rock (Composed Of Multiple Minerals)

Red Sandstone

Arenite (primarily quartz with iron oxide cement)

Conglomerate

Conglomerate (Sedimentary Rock)

Red Sandstone

Arenite (primarily Quartz with Iron Oxide coating)

Blue Apatite

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

Brecciated Jasper

Silicon dioxide (SiO2) microcrystalline quartz breccia

Quartzite Pebble

Quartzite (SiO2)

Quartzite Pebble

Quartzite (SiO2)

Quartz-rich granite pebble

Granite, composed mainly of quartz, feldspar, and mica

Granite

Felsic intrusive igneous rock

Quartzite

Metamorphic rock predominantly composed of Quartz (SiO2)

Red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Bauxite

Bauxite (Al2O3·2H2O)

Gneiss

Gneiss (Metamorphic rock)

Red Jasper

Chalcedony (SiO2) with iron inclusions

Likely slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Weathered granitic boulder

Granite, typically composed of quartz, feldspar, and mica

Likely quartzite

Quartzite, composed predominantly of quartz (SiO₂)

Likely quartz-rich pegmatite (weathered, mica-bearing)

Granitic pegmatite, composed mainly of quartz and feldspar with possible mica; exact minerals cannot be confirmed from the photo

Likely river-worn granite or granitic pebble

Granite (quartz + feldspar + mica), identification from the image is tentative

Vesicular Basalt

Vesicular Basalt (rich in silicate minerals mostly Plagioclase and Pyroxene)

Dalmatian Jasper

Dalmatian Stone (Felsite with Arfvedsonite/Tourmaline)

Sandstone

Arenite (primarily SiO2)

Quartzite

Quartzite

Quartz Vein in Host Rock (likely Sandstone or Mudstone)

Silicon Dioxide (SiO2) within Sedimentary Matrix

Granite

Granite (Felsic Plutonic Rock)

Likely quartzite pebble

Quartzite, composed predominantly of quartz (SiO₂)

Dark, coarse-grained rock (likely gabbro)

Gabbro, a mafic intrusive igneous rock

Quartzite

Quartzite (composed primarily of Silica, SiO2)

Granite-like gneiss

Foliated granitic gneiss, composed mainly of quartz, feldspar, and mica

Dark gray metamorphic cobble, likely slate or phyllite

Foliated metapelite; possibly slate/phyllite composed mainly of quartz, mica, and chlorite

Granite

Intrusive igneous rock

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Quartzite

Quartzite (composed primarily of SiO2)

Quartzite

Quartzite (composed primarily of SiO2)

Diorite

Intermediate plutonic igneous rock

Quartzite (River Stone)

Quartzite (SiO2)

Siltstone

Siltstone (composed of microscopic quartz and clay minerals)

Gneiss

Gneiss (Metamorphic Rock)

Red Granite Pebble

Intrusive Felsic Igneous Rock (Granite)

Greywacke with Quartz Veins

Lithic Sandstone (Greywacke) with SiO2 inclusions

Quartzite

Quartzite (composed primarily of SiO2)

Garnet Schist

Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)