Sedimentary Rock (Altered)

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Red Jasper (nodule)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartz (Milk Quartz / Massive Quartz)

Silicon Dioxide (SiO2)

Almandine Garnet in Matrix

Almandine (Fe3Al2(SiO4)3)

Druzy Quartz on Agate/Chert

Silicon Dioxide (SiO2)

Chert (River Cobble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Shale

Shale

Schist with Biotite Inclusion

Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)

Gneiss (specifically Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Green Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2)

Anthracite Coal

Anthracite (Carbon-based sedimentary-derived metamorphic rock)

Yellow Jasper

Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Sandstone (Wonderstone)

Silicified Sandstone / Orthoquartzite with Liesegang rings

Bloodstone

Heliotrope (cryptocrystalline Quartz, SiO2 with inclusions of Hematite)

Red Sandstone

Sandstone (mainly SiO2 with Iron Oxide cement)

Sandstone (specifically Picture Sandstone or Wonderstone)

Arenite (composed primarily of SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartzite

Quartzite (primarily SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Carnelian

Carnelian (SiO2 with Iron Oxide impurities)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Turquoise

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

Gneiss (Banded Gneiss)

Gneiss

Ironstone Concretion (Moqui Marble Type)

Goethite/Hematite-cemented Sandstone Concretion

Geode (Unopened)

Silica-lined Vug (primarily SiO2)

Yellow Chert (Gold-toned Jasper)

Silicon Dioxide (SiO2)

Bauxite

Bauxite (Al(OH)3 mixed with Fe2O3 and clay minerals)

Limestone

Calcium Carbonate (CaCO3)

Ferruginous Sandstone (Iron-rich Sandstone)

Ferruginous Arenite

Conglomerate (River Rock Aggregate)

Conglomerate (Lithic-clast conglomerate)

Chert / Jasper

Microcrystalline Quartz (SiO2)

Chert (Brecciated River Cobble)

Silicon Dioxide (SiO2)

Chert (Jasper/Ironstone variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

River Siltstone / Mudstone Pebble

Siltstone (composed of mixed silicate and carbonate minerals)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Turquoise

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

Pyrite (on host rock/ore)

Iron Sulfide (FeS2)

Jasper in Quartz (River Cobble)

Silicon Dioxide (SiO2) with Ferric Iron inclusions