Mineral (Specifically, A Variety Of The Mineral Species Pyrope Almandine Garnet)

Pink Granite (with Potassic Feldspar and Quartz)

Felsic Intrusive Igneous Rock (Granite)

Sandstone (with ripple marks)

Arenite / Quartz Sandstone

Ruby in Zoisite

Anyolite (combination of Ca2Al3(SiO4)3(OH) and Al2O3:Cr)

Milky Quartz Pebble (Tumbled Quartzite)

Silicon Dioxide (SiO2)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Schist (Micaceous Schist)

Mica Schist

Chlorastrolite (Isle Royale Greenstone)

Chlorastrolite (Pumpellyite-(Mg,Fe2+): Ca2MgAl2(Si2O7)(SiO4)(OH)2∙H2O)

Olivine (Peridotite/Dunite)

Olivine (Mg,Fe)2SiO4 within Peridotite

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Milky Quartz Mushroom Carving

Quartz (Silicon Dioxide, SiO2)

Fossilized Shark Tooth

Fossilized Elasmobranchii tooth (likely Odontaspis or Carcharias)

Greenstone

Greenschist (metamorphosed mafic igneous rock)

Blue Sapphire

Corundum (Al2O3 with trace amounts of iron and titanium)

Orange Calcite (Banded Calcite)

Calcium Carbonate (CaCO3)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Clear Quartz (Druzy)

Crystalline Silicon Dioxide (SiO2)

Chert (specifically Tan/Brown Chert)

Chert (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Limonite

Hydrous Iron Oxide (often Goethite FeO(OH), Lepidocrocite γ-FeO(OH), and other amorphous iron oxyhydroxides)

Strawberry Quartz

Quartz with Hematite inclusions (SiO2 + Fe2O3)

Raw Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Sandstone (Ferruginous)

Arenite (with iron oxide cement, Fe2O3)

Tiger's Eye

Tiger's Eye (a variety of Quartz, SiO₂)

Bumblebee Jasper

Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)

Schist

Mica Schist (primarily Muscovite and Biotite)

Green Aventurine

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

Green Aventurine

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

Green Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Orange Calcite (Carved as a Horned Skull)

Calcium Carbonate (CaCO3)

Arfvedsonite in Quartz (also known as Eudialyte/Garnet Syenite variety)

Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2] within a silicate matrix

Ferruginous Sandstone

Sandstone (rich in iron oxides/hydroxides)

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Milky Quartz

Silicon Dioxide (SiO2)

Pink Granite

Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Banded Agate (specifically sardonyx or carnelian agate variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Banded Agate (specifically Black Sardonyx/Onyx variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz