Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Red Sandstone (Iron-rich Sandstone)

Clastic Sedimentary Rock - Quartz Arenite / Arkose with Hematite Cement

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Diorite

Phaneritic Intermediate Plutonic Rock (Diorite)

Quartzite (Tumbled Pebble)

Metamorphosed Quartz Sandstone (SiO2)

Septarian Nodule (Galt)

Calcareous concretion / Septarian concretion

Liesegang Ring Siltstone

Siltstone with iron oxide Liesegang bands

Basalt with Vesicular Texture (Beach Cobble)

Vesicular Basalt (Aphanitic Igneous Rock)

Quartzite

Quartzite (mainly SiO2)

Conglomerate

Conglomerate (Detrital sedimentary rock)

Turquoise

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

Ferruginous Chert

Microcrystalline Quartz (SiO2) with Iron Oxides

Anthracite Coal

Anthracite (Carbon Content: 86%-97%)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Pegmatite (Granitic)

Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)

Septarian Nodule (Dragon Stone)

Septarian concretion (Complex of Calcite, Aragonite, and Limestone/Clay)

Gastropod Steinkern (Fossil Snail Internal Mold)

Class Gastropoda (Internal Mold)

Quartzite River Rock (with Quartz Vein)

Quartzite (SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide (Limonite/Hematite) coating

Bauxite (Laterite Clay)

Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))

Aventurine (likely Green Aventurine)

Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)

Citrine Geode Fragment

Citrine (Silicon Dioxide with Iron Impurities), SiO2

Quartzite

Quartzite (primarily SiO2)

Rhodonite

Manganese silicate (MnSiO3)

Quartzite Pebble (Beach Stone)

Quartzite (primarily SiO2)

Ironstone (likely Limonite or Goethite)

Ferruginous sedimentary rock (FeO(OH)·nH2O)

Serpentine

Serpentine Group (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Ironstone with Pyrite

Ferruginous Sandstone (Fe2O3) with minor Sulfide minerals (FeS2)

Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)

Diorite (Igneous rock, intrusive, intermediate composition)

Unakite (or Epidotized Granite)

Epidotized Granite (Composition: KAlSi3O8, Ca2(Al,Fe)3(SiO4)3(OH), SiO2)

Biotite (Black Mica)

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

Orthoclase Feldspar (or K-Feldspar)

Orthoclase (KAlSi3O8)

Serpentine

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4

Quartzite River Rock

Quartzite (SiO2)

Red Quartzite (River Pebble)

Quartzite (primarily Silicon Dioxide - SiO2)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn)2-3(Si, Al, Fe)2O5(OH)4

Grey Granite

Phaneritic Felsic Intrusive Igneous Rock

Fossilized Coral

Scleractinian Anthozoa (Fossilized Calcium Carbonate, CaCO3)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Serpentine

Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4