Not A Rock (Animated Character)

Graywacke (River Cobble)

Lithic Sandstone (Graywacke)

Orange Quartzite (Tumbled Beach Pebble)

Quartzite (primarily SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Hematite/Limonite) inclusions

Fossilized Crinoid Stem

Class Crinoidea (Echinodermata)

Milky Quartz Geode Fragment

Silicon Dioxide (SiO2)

Jasper with Chert

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Moonstone (Tumbled)

Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite

Shungite

Shungite (Non-crystalline carbon, C)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sodalite

Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite inclusions

Labradorite (Dark Matrix)

Plagioclase Feldspar ((Ca, Na)(Al, Si)4O8)

Moonstone

Orthoclase feldspar ((K,Na)AlSi3O8)

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Ironstone Concretion (Moqui Marble)

Iron-oxide Concretion (Hydrated ferric oxide, Fe2O3·nH2O)

Green Aventurine

Silicon dioxide (SiO2) with Fuchsite inclusions

Basalt with Epidote Veining

Basalt (Mafic Extrusive Rock) with Ca2(Al,Fe)3(SiO4)3(OH)

Chert (Flint Nodules)

Microcrystalline silica (SiO2)

Vesicular Basalt

Vesicular Basalt (Aphanitic Mafic Rock)

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3/FeO(OH))

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Red Hematite

Iron(III) oxide (Fe2O3)

Basalt with Amygdules

Amygdaloidal Basalt

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite treated with acid

Quartz (Milky/Clear Variety)

Silicon Dioxide (SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Carnelian

Carnelian (SiO2 - Silicon Dioxide)

Crushed Limestone

Calcium Carbonate (CaCO3)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Serpentine

Serpentine group ((Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz

Blue Agate (Dyed)

Silicon Dioxide (SiO2) with artificial pigment

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Carnelian

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

Fossiliferous Limestone with Brachiopods

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

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Zebra Marble

Metamorphosed Alabaster/Limestone (CaCO3)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Jasper (Tumbled)

Silicon Dioxide (SiO₂)