Sedimentary (Base), Then Artificial

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)

Fossiliferous Limestone (Coquina-like)

Biogenic Limestone

Fossilized Coral (Petoskey Stone or similar)

Hexagonaria percarinata (Fossilized Rugose Coral)

Conglomerate

Clastic Conglomerate (Lithic-rich)

Sandstone

Arenite (primarily SiO2)

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)

Fossilized Favosites (Honeycomb Coral)

Favosites (extinct genus of tabulate coral)

Red Sandstone

Arenite

Gneiss

Gneiss (High-grade metamorphic rock)

Mica Schist

Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)

Chert (Quartz Variety)

Chert (mostly SiO2 / Silicon Dioxide)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Biotite Schist

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

Quartz Vein in Sandstone

Sandstone with Hydrothermal Quartz (SiO2)

Glauconite (Green Sandstone)

Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2

Red Sandstone

Arenite (predominantly Quartz with Hematite cementation)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Gneiss

Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)

Crushed Limestone

Sedimentary Calcium Carbonate (CaCO3)

Tree Agate

Silicon Dioxide (SiO2) with Chlorite/Manganese inclusions

Polygenetic Breccia

Clastic Breccia (containing lithic fragments in a fine-grained matrix)

Black Veined Jasper (Spiderweb Jasper)

Silicon Dioxide (SiO2)

Pink Granite

Phaneritic Plutonic Felsic Igneous Rock (Granite)

Chert (River Pebble)

Chert (Silica, SiO2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate

Clastic sedimentary rock (Puddingstone)

Golden Mica Schist

Mica Schist (primarily Muscovite/Biotite with Quartz)

River Cobble (Phyllite or Quartzite)

Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)

Green Moss Agate

Silicon Dioxide with inclusions (SiO2)

Mica Schist with Garnet inclusions

Mica Schist (primarily Muscovite and Biotite - KAl2(AlSi3O10)(OH)2)

Anthracite Coal

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Coal (Anthracite)

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Dragon Stone

Ohko Stone (Argillaceous sedimentary rock)

Banded Calcite (Green Onyx)

Calcium Carbonate (CaCO3)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay impurities

Green Moss Agate

Silicon Dioxide (SiO2) with Mineral Inclusions

Zebra Jasper (Zebra Stone)

Tumbled Silicon Dioxide (SiO2) with impurities

Jasper

Silicon Dioxide (SiO2)

Schist/Phyllite

Metamorphic Schist (Chlorite Schist variety)

Grey Chalcedony (Tumbled)

Chalcedony (SiO2)

Chert

Chert (Microcrystalline Quartz, SiO2)