Sedimentary Rock (Technically A Variety Of Chalcedony)

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 principal composition)

Sandstone (Ferruginous)

Arenite (SiO2 with Iron Oxide impurities)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Beryl (likely Aquamarine) in matrix

Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)

Ferruginous Sandstone (with Iron Oxide staining)

Clastic Sedimentary Rock - Quartz Arenite/Wacke

Chert (Jasper variety)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Limestone

Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Pyrite (FeS2)

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Sandstone with Liesegang Rings

Arenite with Iron Oxide Concretions

Conglomerate

Clastic sedimentary rock (Polymictic Conglomerate)

Bituminous Coal

Organic Sedimentary Rock (Carbon-based)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Concretion (Sandstone)

Sandstone Concretion

Yellow Jasper

SiO2 (Silicon Dioxide)

Chert with Asphaltum (or Tar)

Silica (SiO2) with natural Bitumen/Asphaltum

Chert (Red Jasper)

Silicon Dioxide (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Mixed Quartz and Jasper Pebbles

Silicon Dioxide (SiO2)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Sandstone Geode (Unbroken)

Siliciclastic sedimentary rock (primarily Quartz)

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Schist

Mica Schist

Sandstone (likely Quartzose Sandstone with mineral staining)

Arenite (composed mainly of SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Serpentinite

Serpentinite ((Mg,Fe,Ni,Al)3Si2O5(OH)4)

Dalmatian Stone

Dalmatian Jasper (Aplitic Rock)

Limestone (with Iron-Oxide staining)

Sedimentary Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO₂)

Jasper (Iron-rich Chert)

Silicon Dioxide (SiO2) with impurities of Hematite or Goethite

Greywacke (River Pebble with Quartz Veins)

Greywacke (Indurated Sandstone); Veins: SiO2 (Quartz)

Sandstone

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (likely Fossiliferous)

Arenite / Fossiliferous Sandstone (SiO2 composition)

Serpentinite

Serpentinite (complex silicate minerals including Mg3Si2O5(OH)4)

Ironstone (likely siderite or goethite-rich siltstone)

Ferruginous Siltstone

Dark-colored Igneous Rock (likely Basalt or Diabase)

Basalt (extrusive igneous) or Diabase (intrusive igneous)

Dolerite (Diabase)

Dolerite / Diabase