Metamorphic, Likely Sedimentary With Quartz Veins

Vuggy Quartz on Matrix

Silicon Dioxide (SiO2)

Cloudy Quartz

Quartz (Silicon Dioxide, SiO2)

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Yellow Quartz (Citrine or Quartzite Pebble)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

Rose Quartz (likely carved)

Rose Quartz (SiO2)

Sandstone (Weathered)

Arenite (primarily SiO2)

Strawberry Quartz (Lepidocrosite/Hematite-Included Quartz)

Quartz (Silicon Dioxide) with Lepidocrosite or Hematite inclusions (SiO2 + Fe2O3 · nH2O)

Chalcedony (Commonly known as Carnelian or Agate pebble)

Microcrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Blue Quartz (Dumortierite Quartz)

Quartz (SiO2) with inclusions of Dumortierite (Al7(BO3)(SiO4)3O3)

Greywacke with Quartz Vein

Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Geode/Cluster

Quartz (SiO2)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Aventurine (likely Green Aventurine)

Quartz (SiO2) with included minerals (Fuchsite or Chlorite for green color)

Rough Agate/Chert Nodules

Cryptocrystalline Quartz (SiO2)

Sandstone

Arenite (Siliclastic sedimentary rock)

Smoky Quartz (Polished)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Citrine

Citrine (Silicon Dioxide - SiO2)

Smoky Quartz

SiO2 (Silicon Dioxide)

Citrine

Crystalline Quartz (SiO2) with iron impurities

Smoky Quartz

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)

River Pebble (likely Quartzite or Chert)

Silicon Dioxide (SiO2) crystal conglomerate

Milky Quartz

Silicon Dioxide (SiO2)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz with Tourmaline and Iron Staining

Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Sandstone

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Granite with Quartz Vein

Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)

Sandstone (likely Quartzose)

Sandstone (Principally SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Rutilated Quartz (with Garnet pendant)

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (with Manganese staining)

Arenite (composed primarily of SiO2)