Mineral (Variant Of Quartz)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Citrine

Silicon dioxide (SiO2)

Sandstone (Quartzite Pebble)

Arenite (SiO2)

Chert (containing Iron Oxide)

Microcrystalline Quartz (SiO2)

Chert (specifically Jasper/Carnelian variety)

Microcrystalline quartz (SiO2)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Jasper with Quartz inclusions

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (specifically Citrine or Yellow Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Amygdaloidal Basalt with Epidote

Vesicular Basalt with secondary Epidote/Quartz mineral infill

Chert Pebble with Quartz Veining

Microcrystalline Quartz (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Blue Aventurine

Quartzite with Dumortierite inclusions (SiO2 + Al7(BO3)(SiO4)3O3)

Eagle Eye Stone (Gray-Blue Tiger's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Granite Pegmatite

Phaneritic Plutonic Igneous Rock

Rough Green Beryl (Emerald variety)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Banded Agate (Crazy Lace/Mexican Agate Variety)

Silicon Dioxide (SiO2)

Gold Nugget

Native Gold (Au)

Unakite

Epidote-Feldspar rock

Sandstone

Arenite (composed primarily of Quartz, SiO2)

Gold Nugget

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Amethyst (Chevron Amethyst/Dream Amethyst)

Silicon Dioxide (SiO2) with trace Iron impurities

Smoky Quartz

Silicon Dioxide (SiO2)

Snowflake Obsidian

Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)

Green Quartzite

Meta-quartzite with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)

Sandstone (Ferruginous)

Arenite (with Iron Oxides)

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Banded Chert in Matrix

Microcrystalline Quartz (SiO2)

Jasper

Quartz (SiO2) with impurities

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Milky Quartz

Silicon Dioxide (SiO2)

Vesicular Basalt with Epidote

Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Basalt with Amygdaloidal Inclusions

Aphanitic Mafic Volcanic Rock (Basalt)

Amygdaloidal Basalt

Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Basalt with Quartz/Calcite Veins

Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)