Organic Materia (Not A Rock Or Mineral)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (Quartz Sandstone)

Arenite (primarily SiO2)

Wishing Stone (Basalt with Quartz Vein)

Basalt containing a microcrystalline quartz (SiO2) or calcite vein

Sandstone (Greywacke/Lithic Sandstone)

Arenite (composed primarily of SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Ferruginous Sandstone (Gritstone)

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

Red Jasper (Brecciated Jasper)

SiO2 (Silicon Dioxide) with Ferric Iron inclusions

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Granodiorite (foreground) and Rose Quartz (background)

Granodiorite / Quartz (SiO2)

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Ruby in Kyanite

Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Diorite

Intrusive Igneous Rock (Intermediate Composition)

Rock Salt (Halite)

Halite (Sodium Chloride, NaCl)

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Gneiss (specifically a Granitic Gneiss)

Gneiss (Composition: Quartz, Feldspar, Mica)

Amygdaloidal Basalt with Secondary Minerals

Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)

Sandstone Concretion

Septarian or Carbonate-cemented Sandstone Concretion

Ironstone Concretion

Limonitic/Hematitic Concretion

Ironstone (with possible Hematite/Limonite coating)

Ironstone (Fe-rich sedimentary rock)

Red Aventurine

Aventurine Quartz (SiO2 + Hematite/Goethite)

Quartz Pebble

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)

Red Sandstone

Arenite (with Iron Oxide)

Laterite

Laterite (Ferricrete)

Slag

Anthropogenic Iron Silicate Glass

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Desert Rose

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Sandstone

Arenite (primarily SiO2)

Amygdaloidal Rhyolite (often called Lake Superior Agate relative)

Rhyolite with Calcite/Quartz amygdules (SiO2 and secondary minerals)

Sandstone (likely Quartzose Sandstone with mineral staining)

Arenite (composed mainly of SiO2)

Quartz Pebble (River Rock)

Silicon Dioxide (SiO₂)

Conglomerate (or Breccia)

Clastic Sedimentary Rock (Conglomeratic)

Sandstone (with manganese staining)

Clastic sedimentary rock (primarily SiO2)

Sunstone

Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)

Gneiss

Gneiss (High-grade regional metamorphic rock)