Mineral Side Rock

Sandstone (Quartzose)

Arenite (SiO2 based typically)

Sandstone

Sedimentary Rock (Quartz arenite)

Granitic Pegmatite

Pegmatitic Granite

Sandstone (River Rock)

Arenite (composed primarily of SiO2)

Vesicular Basalt (Scoria)

Basalt with vesicular texture

Likely weathered iron-rich breccia or jasper

Silicified iron-oxide breccia; exact identification requires testing

Sandstone

Arenite (SiO2 primarily)

Sandstone

Arenite (SiO2 based)

Unidentified brown mineral/rock fragment

Indeterminate from image; possibly iron-stained quartz, feldspar, or weathered limonite

Sandstone Pebble

Arenite (SiO2 based)

Sandstone Pebble

Arenite (SiO2 complex)

Quartz Geode

Silicon Dioxide (SiO2) within a geode

Sandstone

Arenite (SiO2 primarily)

Chert with Quartz Veining

Microcrystalline Silica (SiO2)

Gabbro or Diorite with Quartz/Epidote Vein

Intrusive Igneous Rock (Plutonic)

Unakite

Epidotized Granite

Weathered granite fragment

Granite, primarily quartz, feldspar, and mica

Painted Rock / Geode Specimen

Silicon Dioxide with artificial pigment coating

Quartz Geode

Silicon Dioxide (SiO2)

Sandstone

Arenite

Hag Stone

Perforated sedimentary rock (typically sandstone or limestone)

Glacial Cobble with Granite Inclusion

Porphyritic Basalt or Andesite containing Granitic Xenolith

Basalt with Quartz/Calcite Veins

Aphanitic Mafic Igneous Rock (Hydrothermal Veined)

Unable to identify - Image contains non-geological items

Geode with Quartz and possibly Jasper/Hematite

Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides

Banded Sandstone

Arenite (with iron oxide banding)

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Shale

Shale (Fine-grained clastic sedimentary rock)

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Desert Rose

Gypsum (CaSO4·2H2O) or Barite (BaSO4)

Sandstone

Sedimentary Rock (Quartz arenite)

Sandstone

Arenite (SiO2 based typically)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Sandstone

Sandstone (Quartz-rich sedimentary rock)

Veined Limestone (Micrite) with Quartz/Calcite Veins

Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions

Sandstone

Arenite (SiO2 primarily)

Red Sandstone (with possible iron oxide staining)

Sandstone (primarily Quartz with Hematite/Goethite cement)

Sandstone (Wonderstone)

Arenite (composed primarily of SiO2 with Fe2O3 impurities)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)

Sandstone (Banded Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with iron oxide impurities)

Moonstone

Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8

Sandstone (with Limonite staining)

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