Metamorphic Rock (Variety Of Quartz)

Blue Tiger's Eye

Riebeckite (crocidolite variety)

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica)

Amethyst (Quartz variety)

Silicon Dioxide (SiO2) with iron impurities

Snowflake Obsidian

Vitreous volcanic silicate rock (SiO2) with Spherulite inclusions

Tiger's Eye (Inlaid in a band)

SiO2 (Silicon Dioxide with Crocidolite inclusions)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

River Pebble (Likely Quartzite or Chert)

Quartzite (primarily SiO2)

River Cobble (Quartzite)

Meta-orthoquartzite

Limonite-stained Quartz

Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide (FeO(OH)·nH2O) staining

Jasper

Jasper (Silicon Dioxide, SiO2)

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Red Jasper

Jasper (a variety of Quartz, SiO2)

Quartzite (Iron-stained)

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Yellow Quartzite (Iron-stained)

Quartzite (primarily SiO2 with Fe2O3 staining)

Chert Nodule

Chert (Cryptocrystalline variety of Quartz, SiO2)

Chert (Iron-Stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz-veined Schist (or Metasandstone)

Metamorphic Rock with Quartz Veining (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Clear Quartz (beads in a bracelet)

Quartz (SiO2)

Yellow Quartz (Citrine Quartz variety / Ferruginous Quartz)

Silicon Dioxide (SiO2) with iron inclusions

Iron-stained Quartzite

Metamorphic Quartz (SiO2) with limonite/hematite staining

Gold Ore in Quartz

Native Gold (Au) in Quartz (SiO2)

Chert (Jasper variety)

Cryptocrystalline quartz (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Banded Gneiss with Quartz Vein

Foliated Metamorphic Rock (Gneiss)

Quartzite River Pebble

Quartzite (SiO2)

Granite

Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Unakite

Unakite (altered granitic rock)

Jasper (Yellow/Brown variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Agate (Polished Nodule)

Agate (Silicon Dioxide, SiO2)

Serpentine (Greenstone)

Antigorite, Lizardite, and Chrysolite mixture (Mg3Si2O5(OH)4)

Chert (Flint)

Microcrystalline Quartz (SiO2)