Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz Druzy Geode

Silicon Dioxide (SiO2) - Crystalline Variety

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Mica Schist (with Muscovite)

Muscovite/Quartz Schist (KAl2(AlSi3O10)(OH)2)

Ferruginous Quartz

Quartz with Iron Oxide inclusions (SiO2 + Fe2O3)

Quartz in Matrix

Silicon Dioxide (SiO2)

Muscovite Schist with Quartz

KAl2(AlSi3O10)(OH)2 in Schistose matrix

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (Sandstone)

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Sandstone (likely Quartz Sandstone)

Arenite (SiO2 based)

Sandstone (Ferruginous)

Arenite with Iron oxide staining (SiO2 with Fe2O3)

Sandstone (Quartz-rich)

Arenite (composed mainly of SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Sandstone (clastic sedimentary rock), primarily SiO2

Sandstone

Arenite (SiO2 based with quartz grains)

Sandstone (Quartzite Pebble)

Arenite / Metamorphosed Sandstone (SiO2)

Jasper with Quartz inclusions

Silicon Dioxide (SiO2)

Gneiss

High-grade metamorphic rock (Gneiss)

Granitic Gneiss

Gneiss (High-grade regional metamorphic rock)

Sandstone

Arenite (composed primarily of SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix

Sandstone (Quartzite-rich Cobble)

Clastic sedimentary rock (primarily SiO2)

Agatized Fossil (Druzy Agate)

Silicon Dioxide (SiO2) replacing organic matter

Sandstone

Arenite (primarily Quartz, SiO2)

Sandstone

Arenite

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Blue Chalcedony

Microcrystalline Quartz (SiO2)

Sandstone concretion (Ironstone-stained)

Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Gneiss with Quartz Veining

Gneiss (High-grade regional metamorphic rock)

Chalcedony (Botryoidal/Agate nodule)

Microcrystalline Quartz (SiO2)

Gold

Native Gold (Au)

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

Sandstone

Arenite (primarily SiO2)

Bornite

Bornite (Cu5FeS4)

Gold Mineral

Native Gold (Au)

Quartz (Milky/Rose Quartz variety)

Silicon Dioxide (SiO2)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)