Quartz
Silicon dioxide (SiO2)
Mineral
Category
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Clear Quartz
Silicon Dioxide (SiO2)
mineral
Dalmation Stone (frequently called Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock
igneous
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Geode with Iron-Stained Quartz/Calcite
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix
sedimentary
Agate (specifically Carnelian Agate or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Vesicular Basalt with Magnetite/Hematite
Mafic Extrusive Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Quartz Vein in Schist
Quartz (SiO2) in Pelitic Schist
metamorphic
Milky Quartz with Chlorite inclusion
Silicon Dioxide (SiO2) with Chlorite group inclusions
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Iron-stained Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) within a geode
sedimentary
Chrysocolla in Matrix
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Silicate/Secondary Copper Mineral)
mineral
Sandstone
Arenite (mostly Quartz-based)
sedimentary
Ferruginous Sandstone
Sandstone (rich in iron oxides/hydroxides)
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Granite
Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica/Amphibole)
igneous
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Unakite
Unakite (Epidotized Granite)
metamorphic
Dalmatian Jasper
Peralkaline rhyolite with Arfvedsonite inclusions
igneous
Moonstone (Tumbled)
Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite
mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 major component)
sedimentary
Granite
Phaneritic Acidic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Gneiss
Metamorphic Gneiss
metamorphic
Granite Pebble
Intrusive Felsic Igneous Rock (Granite)
igneous
Sandstone (likely Arkosic or Lithic Sandstone)
Arenite (composed primarily of SiO2 with various lithic fragments)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock - Arenite
sedimentary
Granite Thin Section
Granitic rock (Phaneritic texture)
igneous
Caribbean Calcite
Calcium Carbonate with Argonite (CaCO3)
mineral
Quartz (River Siltstone Quartzite Pebble)
Silicon Dioxide (SiO2)
metamorphic
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Travertine (Tufa)
Chemical Sedimentary Rock (CaCO3)
sedimentary
Gneiss (River Cobble)
Gneiss (Foliated Metamorphic Rock)
metamorphic
Fossilized Coprolite
Coprolite (fossilized feces)
sedimentary
Gneiss
Gneissic Metamorphic Rock
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Schist
Schist
metamorphic
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous