Anthropogenic (Man Made Material Mimicking Sedimentary Rock)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Banded Iron Formation (BIF) / Iron Ore

Banded Iron Formation (composed primarily of Hematite (Fe2O3) and Magnetite (Fe3O4) with Quartz/Chert)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Geode (unopened)

Silica-filled Concretion (SiO2)

Bauxite (Aluminum Ore)

Hydrated aluminum oxides, primarily Al(OH)3, AlO(OH)

Chert with Asphaltum (or Tar)

Silica (SiO2) with natural Bitumen/Asphaltum

Rhodochrosite

Manganese carbonate (MnCO3)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Tree Agate

Dendritic Chalcedony (SiO2)

Bituminous Coal

Organic sedimentary rock (humic coal)

Quartz

Quartz (Silicon Dioxide - SiO2)

Citrine Geode

Citrine (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Peridot

Olivine ((Mg,Fe)2SiO4)

Bauxite (Pisolitic Bauxite)

Bauxite (mixture of Hydrous Aluminum Oxides)

Pink Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Magnetite (potentially Hematite-rich)

Magnetite (Fe3O4)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pink Chalcedony

Silicon Dioxide (SiO2)

Olivine (likely Peridot variety)

Olivine Mineral Group (specifically Forsterite-Fayalite solid solution series); Chemical formula: (Mg,Fe)2SiO4

Peridot (likely, based on color and appearance)

Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)

Limestone

CaCO3 (principally Calcite)

Kyanite

Kyanite (Al2SiO5)

Quartz

Silicon Dioxide (SiO2)

Fluorite (likely)

Calcium Fluoride (CaF2)

Fluorite

Calcium Fluoride (CaF2)

Red Jasper (possibly Carnelian)

Silicon Dioxide (SiO2) with Hematite impurities

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Rhodonite with Manganese Oxides

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Quartz (Druzy)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 predominantly)

Hematite

Iron(III) oxide (Fe2O3)

Halite

Halite (Sodium Chloride, NaCl)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or Smoky Quartz)

Silicon Dioxide (SiO2)

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Ironstone Concretion

Limonitic/Hematitic Concretion

Quartz Geode

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)