Mineral (Processed Alloy)

Red Aventurine

Quartz containing Hematite or Goethite (SiO2)

Quartz with Mica inclusions (Pegmatite)

Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions

Granite

Granite (Felsic Plutonic Rock)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Schist (containing Muscovite Mica and Chlorite)

Mica Schist

Quartz Pebble

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz-veined Siltstone

Siltstone with Quartz (SiO2) veins

Schist

Mica Schist (primarily Muscovite and Biotite)

Garnet Schist or Garnet-bearing Quartzite

Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Porphyry

Porphyritic Rhyolite or Andesite

Gabbro or coarse-grained dioritic rock

Plutonic mafic/intermediate rock; typically plagioclase feldspar + pyroxene ± amphibole/biotite

Quartz-veined Sandstone

Quartzite-veined Arenite / SiO2 and quartz sand

Quartz with Tourmaline and Iron Staining

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

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Labradorite (White/Grey Labradorite)

Labradorite: (Ca, Na)(Al, Si)4O8

Quartz with Chalcopyrite and Pyrite

Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)

Dalmatian Stone (Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Granite

Phaneritic Felsic Intrusive Rock

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (with Feldspar/Mica)

Granitic Quartz / SiO2 with KAlSi3O8

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Chert / River Pebble

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Sedimentary silica (SiO2)

Garnet in Schist

Almandine Garnet in Mica-Schist (Fe3Al2(SiO4)3)

Quartz Pebble

Silicon Dioxide (SiO2)

Porphyritic Basalt

Porphyritic Extrusive Igneous Rock

Porphyritic Basalt (Chinese Writing Stone)

Porphyritic Basalt with Feldspar Phenocrysts