Mineral (Metal)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Dalmatian Jasper

Peralkaline rhyolite with Arfvedsonite inclusions

Sandstone

Arenite (primarily SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (with potentially high Feldspar/Arkose content)

Clastic sedimentary rock (SiO2 dominated)

Sandstone

Arenite (primarily SiO2)

Moonstone

Orthoclase feldspar ((K,Na)AlSi3O8)

Blue Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite

Calcium Carbonate (CaCO3)

Blue Chalcedony

Silicon Dioxide (SiO2)

Yellow Aventurine

Quartz (Silicon Dioxide - SiO2) with inclusions of Mica

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Agate

Silicon dioxide (SiO2) - variety Chalcedony

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Sandstone

Arenite (SiO2 based)

Black Tourmaline

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

Sandstone

Arenite (composed primarily of SiO2)

Blue Quartz (Dumortierite Quartz)

Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)

Orange Calcite

Calcium Carbonate (CaCO3)

Satin Spar Selenite

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Agate (specifically Carnelian Agate)

Silicon dioxide (SiO2) - Chalcedony variety

Sandstone

Arenite (primarily SiO2)

Milky Quartz Geode with Chlorite

Silicon Dioxide (SiO2) with Chlorite group inclusions

Sandstone (likely Graywacke or Lithic Sandstone)

Arenite / Wacke (SiO2 based with lithic fragments)

Raw Diamond (Rough Uncut)

Diamond (C - pure carbon)

Milky Quartz (Water-Worn Cobble)

Silicon Dioxide (SiO2)

Sulfur

Native Sulfur (S8)

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Amygdaloidal Basalt

Amygdaloidal Basalt

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (70–75% SiO2)

Meteorite (Chondrite)

Stony Meteorite (Ordinary Chondrite)

Calcite

Calcite (CaCO3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Schist

Mica Schist (Quartz-Muscovite-Biotite Schist)

Bauxite (Concretionary)

Bauxite (Al(OH)3, AlO(OH))

Milky Quartz Pebble with Chert

Silicon Dioxide (SiO2)

Quartz (Chert/Chunky Chalcedony)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Fluorite

Calcium Fluoride (CaF2)

Natural Gemstone Cabochons (Ruby, Moonstone, Emerald, Citrine)

Ruby (Al2O3:Cr), Moonstone (KAlSi3O8), Emerald (Be3Al2(SiO3)6:Cr), Citrine (SiO2)