Mineral Within A Sedimentary Rock

Sandstone (Stream Pebble)

Arenite (primarily SiO2)

Kambaba Jasper

Stromatolite (Fossilized Algae within Microcrystalline Quartz)

Carnelian

Carnelian (Chalcedony / SiO2)

Chert Nodule in Limestone

Chert (Microcrystalline Quartz, SiO2) and Limestone (Calcium Carbonate, CaCO3)

Conglomerate

Clastic sedimentary rock (Conglomerate)

Milky Quartz Geode or Druzy Quartz

Silicon Dioxide (SiO2)

Carnelian

Carnelian (SiO2 - Silicon Dioxide)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Epidote-bearing Granite (Unakite-like)

Epidotized Granite

Ferruginous Sandstone (Ironstone)

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Olivine Peridotite

Peridotite (comprising Olivine (Mg,Fe)2SiO4 and Pyroxene)

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)

Red Sandstone

Arenite (predominantly Quartz with Hematite cementation)

Thunderegg (Agetized Geode nodule)

Rhyolitic Agate Nodule (SiO2 filling volcanic cavities)

Sandstone

Arenite (SiO2 principal)

Quartzite (specifically an iron-stained or Carnelian-colored variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Opaque cryptocrystalline variety of Quartz

Biotite Schist

Biotite Schist

Sandstone (Ferruginous)

Arenite (Fe-rich)

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)

Turquoise

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

Biotite Mica

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

Chert (specifically Tan Chert)

Chert (SiO2)

Septarian Nodule (Dragon Stone)

Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)

Siderite Concretion (Nodule)

Iron Carbonate (FeCO3) Concretion

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone Beach Pebble

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)

Pink Opal

Amorphous Hydrous Silica (SiO2·nH2O)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Carnelian

Carnelian Chalcedony (SiO2 with iron oxide impurities)

Dyed Agate

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Limonitic Sandstone (Stained Sandstone)

Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining

Healer's Gold (Pyrite and Magnetite in Schist)

Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist

Galena

Lead(II) sulfide (PbS)

Almandine Garnet

Almandine (Fe3Al2Si3O12)

Sandstone (Ferruginous)

Arenite (Fe-rich SiO2)