Mineral (Specifically A Variety Of Chalcedony, Which Is A Microcrystalline Quartz)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Peach Moonstone (Orange/Peach Feldspar)

Potassium aluminum silicate (KAlSi3O8)

Chert (specifically Gray/Black Chert)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Carnelian Agate

Chalcedony (Silicon Dioxide, SiO2)

Quartz / Common Agate

Silicon Dioxide (SiO2)

Citrine Quartz

Crystalline Quartz (SiO2) with iron impurities

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Geode Nodules / Chalcedony Geode

Silicon Dioxide (SiO2) - Amorphous to Cryptocrystalline Quartz

Ferruginous Quartzite (Chert)

Quartzite with Iron inclusions (SiO2 + Fe2O3)

Tiger's Eye (commonly referred to as Blue/Gold Tiger's Eye)

Tiger's Eye is a variety of Chalcedony (cryptocrystalline quartz), SiO2, exhibiting chatoyancy. The blue variety is often called Hawk's Eye.

Chert (White Chert)

Silicon Dioxide (SiO2)

Quartzite (specifically a river-worn pebble)

Quartzite (primarily SiO2)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Jasper

Silicon dioxide (SiO2) with impurities

Quartzite with Gneissic Banding

Quartzite (primarily SiO2) with mafic mineral inclusions

Jasper with Quartz Vein

Silicon Dioxide (SiO2) with impurities

Blue Calcite

Calcium Carbonate (CaCO3)

Red Jasper (possibly Carnelian)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Chert (and Flint)

Chert (SiO2)

Chert (often called Flint)

Microcrystalline to cryptocrystalline quartz (SiO2)

Chrysocolla in Quartz (Quantum Quattro variant)

Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) often mixed with SiO2

Banded Iron Formation (BIF) / Tiger Iron

Ferruginous Chert (primarily Quartz [SiO2] and Hematite/Magnetite [Fe2O3/Fe3O4])

Clear Quartz (beads in a bracelet)

Quartz (SiO2)

River Pebble (Brecciated Chert/Siltstone)

Silicon Dioxide (SiO2) with mineral inclusions

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Tree Agate

Dendritic Chalcedony (SiO2)

Red Jasper (Polished)

Silicon Dioxide (SiO2) with Hematite inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Granite

Phaneritic Plutonic Felsic Rock (primarily Quartz (SiO2), Alkali Feldspar, and Plagioclase Feldspar)

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Bumble Bee Jasper

Calcite-bearing Volcanic Tuff (not a true Jasper)

Green Tiger's Eye

Silicified Crocidolite (Quartz variety, SiO2)

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Blue Quartzite

Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)

Chert (specifically White Chert or Novaculite)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Brecciated Jasper

Silicon Dioxide (SiO2) with Hematite and Quartz inclusions

Emerald

Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium