Mineral (Synthetic Glass)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Golden Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Jasper

Silicon dioxide (SiO2)

Green Quartzite

Quartzite (primarily SiO2 with trace impurities)

Green Aventurine

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Chert

Silicon dioxide (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Chalcedony (Commonly known as Carnelian or Agate pebble)

Microcrystalline Quartz (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Muscovite Mica

Muscovite / KAl2(AlSi3O10)(OH)2

Aventurine (Green Quartz)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz Cluster

Quartz (Silicon Dioxide - SiO2)

Clear Quartz (Tumbled)

Quartz (Silicon Dioxide - SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide - SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Amethyst

Amethyst (SiO2 - Silicon Dioxide with iron impurities)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chert (containing Iron Oxide)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Pyrite in Matrix (likely Quartz or Schist matrix)

Iron Sulfide (FeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon dioxide (SiO2)

Marble

Recrystallized Calcite (CaCO3) / Marble

Moonstone (Feldspar)

Orthoclase or Oligoclase (KAlSi3O8)

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Sandstone

Arenite (primarily SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (SiO2 with Fe2O3 impurities)

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Sandstone (likely Quartzose Sandstone)

Arenite

Sandstone

Arenite