Mineral Or Sedimentary Rock (With Mineral Inclusions)

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Chert / Flint

Chert (varieties include Flint)

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Pink Opal (Common Opal)

Amorphous Hydrated Silica (SiO2·nH2O)

Sandstone

Arenite (primarily SiO2)

Red Sandstone

Arenite (with Iron Oxide cement)

Montana Moss Agate

Chalcedony (SiO2) with Manganese/Iron oxide inclusions

Basalt (Amygdaloidal)

Amygdaloidal Basalt

Ferruginous Quartz (Carnelian-tinted Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sandstone (Ferruginous)

Arenite (Fe-rich)

Amygdaloidal Basalt

Vesicular Basalt with secondary mineral infilling (commonly Zeolites, Calcite, or Quartz)

Sandstone (with garnet granules)

Clastic sedimentary rock (primarily SiO2 with Fe3Al2(SiO4)3 inclusions)

Sandstone (with Iron Staining)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Greywacke with Quartz Veins

Lithic Sandstone (Greywacke) with SiO2 inclusions

Milky Quartz with Mineral Inclusions

Quartz (Silicon Dioxide, SiO2)

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) with varying mineral impurities

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Nodule)

Silicon Dioxide (SiO2)

Garnet Schist

Almandine-Muscovite Schist

Sandstone with Ironstone Concretion

Arenite with Hematite/Goethite nodules (Fe2O3 / FeO(OH))

Banded Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Sandstone

Arenite (ferruginous sandstone)

Green Moss Agate

Silicon Dioxide (SiO2) with inclusions of hornblende or chlorite

Basalt with Secondary Mineral Inclusions

Amygdaloidal Basalt (Mafic volcanic rock, primarily Augite and Plagioclase)

Sandstone (Red)

Arenite (primarily Quartz, SiO2, with Iron Oxide cement)

Milky Quartz (Crystal Cluster)

Silicon Dioxide (SiO2) - Quartz Variety

Conglomerate with Quartz Inclusions

Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)

Yellow Chert (Jasper)

Microcrystalline Quartz (SiO2)

Mica Schist with Pyrite

Muscovite/Biotite Schist with Iron Sulfide (FeS2)

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Carnelian Agate

Silicon Dioxide (SiO2) with Iron Oxide impurities

Quartz Pebble

Silicon Dioxide (SiO2)

Granite

Plutonic felsic igneous rock

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Jasper-Agate Breccia

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Garnet-Bearing Gneiss

Almandine-Garnet Gneiss

Quartz Druzy (on Matrix)

Silicon Dioxide (SiO2)

Sandstone (Muddy/Silty Variety)

Arenite with high silt/clay content (clastic sedimentary rock)