Mineral (Silicate Variety)

Sandstone (Iron-stained)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Serpentinite

Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)

Calcite

Calcite (CaCO3)

Greenstone (Epidote/Chlorite-rich Metabasalt)

Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))

Granite (with alteration)

Granite (Felsic intrusive igneous rock)

Chert (White-Tan variety)

Silicon dioxide (SiO2) / Microcrystalline Quartz

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide with Iron Oxide (SiO2 with traces of Fe2O3/FeO(OH))

Citrine

Citrine (Silicon Dioxide, SiO2)

Sandstone

Arenite (primarily SiO2)

Blue Quartzite

Quartzite (primarily SiO2) with inclusions like Dumortierite or Magnesio-riebeckite

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese

Rose Quartz

SiO2 (Silicon Dioxide)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Rose Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese

Rose Quartz

Silicon Dioxide (SiO2)

Beryl (var. Heliodor or Aquamarine)

Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)

Rose Quartz (Aura Quartz)

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Quartzite

Quartzite (Primary mineral: Silicon Dioxide, SiO2)

Sandstone (Picture Sandstone)

Arenite (primarily SiO2 with iron oxide impurities)

Chert (varietal Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartzite

Quartzite (High-purity SiO2)

Aventurine (likely Green Aventurine)

Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (Flint variety)

Microcrystalline context of Quartz (SiO2)

Smoky Quartz

Quartz (SiO₂)

Red Quartz (Druzy)

Silicon Dioxide (SiO2) with Hematite inclusions

Hematite

Iron(III) oxide (Fe2O3)

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Orange Calcite (often commercially sold as Honey Calcite or Aragonite)

Calcium Carbonate (CaCO3)

Banded Chert in Matrix

Microcrystalline Quartz (SiO2)

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chrysocolla and Azurite on Matrix

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla) and Copper carbonate hydroxide Cu3(CO3)2(OH)2 (Azurite)

Quartz

Quartz (SiO₂)

Banded Chert

Microcrystalline Quartz (SiO2)

Diopside (likely Chromian Diopside)

Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.

Banded Jasper

Silicon Dioxide (SiO2)

Ferruginous Sandstone

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