Sedimentary Mineral

Turquoise

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

Turquoise

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

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)

Sandstone

Arenite (primarily SiO2)

Concretion

Various mineral compositions, typically carbonate or iron oxide cemented sediment

Sandstone Geode (Unbroken)

Siliciclastic sedimentary rock (primarily Quartz)

Conglomerate

Conglomerate (clastic sedimentary rock)

Sandstone (Ferruginous)

Arenite (SiO2 with Iron Oxide impurities)

Tree Agate

Dendritic Chalcedony (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Limonite (Gozzany Iron)

Limonite (FeO(OH)·nH2O)

Herkimer Diamond (Quartz Crystal)

Silicon Dioxide (SiO2)

Sandstone (Pebble)

Clastic sedimentary rock (SiO2 primary)

Pyrite Geode (Sparkling Druzy)

Iron Sulfide (FeS2) in Sedimentary Nodule

Pyrite in Shale

Iron Disulfide (FeS2) in Sedimentary Shale

Schist

Mica Schist

River Pebble (Brecciated Chert/Siltstone)

Silicon Dioxide (SiO2) with mineral inclusions

Black Jasper

Black Jasper (Silicate mineral - SiO2)

Pyrite in Limestone

Iron Sulfide (FeS2) in Calcium Carbonate (CaCO3)

Ferruginous Quartz

Quartz with Iron Oxide inclusions (SiO2 + Fe2O3)

Red Quartz (Druzy)

Silicon Dioxide (SiO2) with Hematite inclusions

Milky Quartz / Rose Quartz fragment

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

Milky Quartz in Matrix

Silicon Dioxide (SiO2)

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Sandstone (Quartz-rich)

Arenite (SiO2 based clastic rock)

Glauconitic Sandstone

Glauconitic Sandstone (complex silicate formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Orange Calcite

Calcium Carbonate (CaCO3)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz Geode (Cracked)

Quartz (Silicon Dioxide, SiO2)

Selenite (Gypsum Variety)

Hydrous Calcium Sulfate (CaSO4·2H2O)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Quartz Geode

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Banded Agate (specifically Carnelian Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Quartz Geode

Silicon Dioxide (SiO2)

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Variscite in Matrix

Variscite (AlPO4 · 2H2O)