Sedimentary Or Igneous Fragment

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss (specifically Micaceous Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Quartz (Milky or Druzy Quartz)

Silicon Dioxide (SiO2)

Cryptocrystalline Quartz (Agate/Chert)

Silicon dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Massive Quartz with Host Rock

Silicon Dioxide (SiO2)

Red Jasper (Chert)

Silicon Dioxide (SiO2) with impure Iron Oxides

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Jasper (likely Polychrome or Desert Jasper)

Silicon Dioxide (SiO2) with impurities

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Quartz (with iron oxide staining)

Silicon Dioxide (SiO2)

Jasper with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

White Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Banded Gneiss

Foliated Gneiss

Quartz (Milky or Smoky variant)

Silicon Dioxide (SiO2)

Hematite

Ferric Oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Clear Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Dyed Pink Agate Slice

Cryptocrystalline variety of Quartz (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO₂)

Greenschist

Chlorite schist

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Rough Quartz

Quartz (Silicon Dioxide, SiO2)

Gneiss (with Quartzite and Biotite)

Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Common Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

Calcite

Calcium Carbonate (CaCO3)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Disulfide (FeS2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Gneiss

Gneiss

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)