Rock (Likely Sedimentary)

Ruby in Kyanite

Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)

Black Mountain Stone (Seiryu Stone)

Limestone with Calcite veins (CaCO3)

River Rock (Greywacke/Sandstone)

Lithic Wacke

Sandstone

Arenite (SiO2 predominantly)

Sandstone

Arenite (SiO2 primarily)

Rough Quartz (likely Rose or Smoky variant)

Silicon Dioxide (SiO2)

Sandstone (specifically Arkose or Ferruginous Sandstone)

Sandstone (SiO2 with iron oxide inclusions)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3/FeO(OH) cement)

Sandstone

Arenite (SiO2 primarily)

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Glauconitic Sandstone

Glauconitic Sandstone (contains (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Ferruginous Sandstone

Arenite with Hematite/Limonite cement (SiO2 + Fe2O3)

Limestone with Quartz or Calcite Veining

Calcium Carbonate (CaCO3) matrix with SiO2 or CaCO3 inclusions

Turquoise

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

Schist (Biotite Schist)

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

Quartz (Milky/Common Quartz)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Bivalve Fossil (Shell Fragment)

Class Bivalvia (Calcium Carbonate - CaCO3)

Gneiss (Metamorphic Rock)

Gneiss

Chert / Flint

Chert (Silicon Dioxide, SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Red Brecciated Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Jasper

Silicon Dioxide (SiO2)

Travertine

Travertine (CaCO3 - Calcium Carbonate)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Dalmatian Stone

Dalmatian Jasper (Peralkaline Quartz-Feldspar Rock)

Druzy Quartz (on Quartzite or Chert)

Silicon Dioxide (SiO2)

Gneiss

Gneissic Metamorphic Rock

Red Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)

Fossilized Favosites (Honeycomb Coral)

Favosites (extinct genus of tabulate coral)

Ironstone Concretion

Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)

Fossilized Coral

Cnidaria (Anthozoa), often replaced by Calcium Carbonate (CaCO3) or Silica (SiO2)

Fossil Shell in Sedimentary Matrix

Bivalvia (fossil) in Calcium Carbonate Matrix

Jasper with Quartz inclusion

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Dalmatian Stone

Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite

Puddingstone (specifically Michigan/Gowganda Puddingstone)

Conglomerate (Jasper Conglomerate)

Coquina

Coquina (Bioclastic Limestone)

Biotite (Mica)

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

Boxwork Siderite or Sepatarian Nodule Weathering

Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment

Carnelian (Orange Agate)

Silicon Dioxide (SiO2)

Green Jasper with Agate Banding

Silicon Dioxide (SiO2) with impurities of ferrous silicate or chlorite