Mineral Within A Sedimentary Rock

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone (Quartz Sandstone)

Arenite (primarily SiO2)

African Turquoise

Teal Jasper (Macro-crystalline Quartz/Sio2 + Inclusions of Copper, Iron, and Manganese)

Banded Chert or Chert with Quartz Veins

Chert (SiO2)

Red Sandstone

Arenite (with Iron Oxide cement)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Pyrite (on host rock/ore)

Iron Sulfide (FeS2)

Gneiss (specifically a weathered or stream-worn specimen)

Gneiss (Foliated Metamorphic Rock)

Siltstone with Quartz Vein

Siltstone (primarily SiO2, Al2O3, Fe2O3)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Marble

Recrystallized Carbonate Rock (CaCO3)

Agate

Agate (Microcrystalline Quartz, SiO2)

White Jade / White Chalcedony

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt)

Porphyritic Basalt (primarily SiO2, Al2O3, FeO, MgO, CaO)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Petrified Wood

Silicified Wood (SiO2)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and mineral impurities

Clay (as a rock-forming material)

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

Red Granite

Felsic Intrusive Igneous Rock

Granite

Phaneritic Plutonic Igneous Rock

Chert (often called Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Wood Jasper

Siliceous sedimentary rock (variety of Chert/Chalcedony)

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite inclusions

Granite

Granite (Phaneritic intrusive igneous rock)

Gneiss (specifically a Granitic Gneiss)

Gneiss (Composition: Quartz, Feldspar, Mica)

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

Scoria (Volcanic Rock)

Scoria (often basaltic scoria)

Carnelian Agate

Carnelian (Silicon Dioxide: SiO2) with iron oxide impurities

Pink Granite

Phaneritic Quartz-Feldspar Plutonic Rock

Garnet (likely Pyrope or Almandine)

Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.

Fluorite (likely Green Fluorite variant)

Calcium Fluoride (CaF2)

Ironstone (Limonitic Sandstone)

Ferruginous Sandstone (rich in Limonite: FeO(OH)·nH2O)

Orthoceras Fossil Limestone

Orthoceras (extinct genus of cephalopod); Limestone matrix (CaCO3)

Moqui Marble (Iron-Oxide Concretion)

Iron Oxide Concretion (Fe2O3)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Limestone

Calcium Carbonate (CaCO3)

Granite

Phaneritic Igneous Rock (Granitic)

Quartz / Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Granite

Granite (Felsic intrusive igneous rock)

Granite

Granite (Felsic Plutonic Rock)

Red Jasper

Jasper (Silicon Dioxide based crypto-crystalline Quartz with Iron inclusions)