Synthetic (Not A Natural Rock)

Moss Agate

Silicon Dioxide with inclusions (SiO2)

Amethyst

Amethyst (Varietal of Quartz), SiO2 (Silicon Dioxide)

Blue Sodalite (Tumbled)

Sodalite (Na8(Al6Si6O24)Cl2)

Quartzite

Quartzite (SiO2)

Fossilized Crinoid Stem

Class Crinoidea (Echinodermata)

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

Quartzite

Quartzite (mostly SiO2)

Quartzite (Iron-stained)

Quartzite (SiO2)

Vesicular Basalt with Lichen

Vesicular Basalt

Quartzite Pebble

Quartzite (SiO2)

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Yellow Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Chert (Common Opal variant)

Silicon Dioxide (SiO2)

Garnet in Matrix (likely Almandine in Quartz/Mica Schist)

Almandine Garnet (Fe3Al2(SiO4)3) in Quartz-Feldspar host rock

Quartzite

Quartzite (SiO2)

River Quartz Pitting / Quartzite Pebble

Quartzite (primarily SiO2)

Ferruginous Sandstone (Ironstone)

Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)

Turquoise (Tumbled/Polished)

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Jasper

Jasper / Silicon Dioxide (SiO₂)

Amazonite

Amazonite (KAlSi3O8, a variety of Microcline)

Bauxite

Bauxite (mixture of Gibbiste Al(OH)3, Boehmite ̳-AlO(OH), and Diaspore ́-AlO(OH))

Basalt with Quartz Vein

Basalt (SiO2 vein inclusion)

Amazonite

Potassium Aluminum Silicate (KAlSi3O8)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Mica (Biotite or Phlogopite variety)

Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)

Coquina

Bioclastic Limestone (Calcium Carbonate, CaCO3)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide

Carnelian

Carnelian (SiO2 - Silicon Dioxide)

Granite

Phaneritic Plutonic Rock (Granite)

Tree Agate (Dendritic Agate/Quartz)

Silicon Dioxide (SiO2) with trace Manganese or Iron oxide inclusions

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Fossiliferous Limestone with Brachiopods

Calcium Carbonate (CaCO3) with fossilized Brachiopoda sp. (likely Order Spiriferida or Rhynchonellida)

Carnelian

SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony

Banded Sandstone

Arenite (composed primarily of Quartz: SiO2)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Wonderstone (Liesegang Sandstone)

Silicified Sandstone with Liesegang Rings (SiO2 + FeO(OH))