Sedimentary Rock (Possibly Composed Of Various Minerals)

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Quartz Geode

Silicon Dioxide (SiO2)

Wishing Stone

Greenschist or Basalt with Quartz/Calcite Vein

Granite

Phaneritic Plutonic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Banded Gneiss

Gneiss (pronounced "nice")

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Unakite

Epidote-Feldspar rock

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 cement)

Quartzite

Quartzite (primarily SiO2)

Diamond in Kimberlite

Kimberlite host rock with C (Carbon) inclusion

Schist

Mica Schist (primarily consisting of muscovite KAl2(AlSi3O10)(OH)2 or biotite K(Mg,Fe)3(AlSi3O10)(OH)2)

Granite (with alteration)

Granite (Felsic intrusive igneous rock)

Limonite Sandstone

Ferruginous Sandstone (Hydrated Iron Oxide)

Sandstone (Pebble)

Arenite (primarily SiO2)

Pink Granite

Phaneritic plutonic igneous rock (Alkali-feldspar granite)

Gold-bearing Quartz with Iron Oxides

Quartz (SiO2) with Limonite/Goethite (FeO(OH)) and Pyrite (FeS2)

Sandstone (Quartzite-rich Cobble)

Clastic sedimentary rock (primarily SiO2)

Pebble (Likely Basalt or Siltstone)

Clastic sedimentary rock or mafic volcanic rock

Sandstone (likely Siltstone)

Arenite or Siltstone (high SiO2 content)

Quartzite

Quartzite (SiO2)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])

Slate

Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)

Granite

Phaneritic Felsic Igneous Rock (composed of quartz, feldspar, and mica)

Banded Onyx (Green Onyx)

Banded Calcite or Travertine (CaCO3)

Sandstone (Glacial Cobble)

Arenite / Sedimentary Rock (primarily SiO2)

Chalcedony

Chalcedony (a microcrystalline variety of Quartz, SiO2)

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and K-feldspar)

Sandstone (Calcareous or Ferruginous)

Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)

Sandstone (Quartzose)

Sandstone (clastic sedimentary rock, primarily SiO2)

Limonite / Ironstone Nodule

Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O

Pearl

Aragonite / Calcium Carbonate (CaCO3)

Quartz Geode (partially opened)

Silicon Dioxide (SiO2) with iron staining

River Stone (Basalt or Siltstone with banding)

Polished Basaltic or Siliciclastic River Cobble

Chert (concretionary/nodular variant)

Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions

Sandstone

Clastic sedimentary rock (primarily SiO2)

Limestone

Calcium Carbonate (CaCO3)

Druzy Quartz Geode (Oco or Moroccan variety)

Silicon Dioxide (SiO2)

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Banded Calcite (often sold as Onyx)

Calcite (Calcium Carbonate, CaCO3)