Mixed (Predominantly Sedimentary And Igneous)

Granite Pebble (River Rock)

Granite (composed primarily of Quartz, Feldspar, and Mica)

Granite Cobble

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

Sodalite

Na8(Al6Si6O24)Cl2

Quartz Geode

Silicon Dioxide (SiO2) in Host Rock

Jasper (Iron-rich)

Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities

Red Jasper (Polished)

Jasper (Iron-rich Microcrystalline Quartz, SiO2)

Geode (Chert or Quartz Nodule)

Silicon Dioxide (SiO2)

Chert (Chert Nodule with Chalky Cortex)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Orange Calcite (Cleavage Rhomb)

Calcite (Calcium Carbonate, CaCO3)

Fluorite, Turquoise, and Calcite set

Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)

Manganese Ore (Psilomelane/Pyrolusite)

Psilomelane ((Ba,H2O)2Mn5O10) and Pyrolusite (MnO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Rough Citrine Quartz

Citrine (Silicon Dioxide, SiO2 with iron impurities)

Pyrite

Pyrite (Iron sulfide, FeS₂)

Chromium (Chrome)

Chromium (Cr)

Granite

Granite (Felsic Intrusive)

Granite

Phaneritic Felsic Intrusive Igneous Rock

Calcite

Calcite (Mineral, Calcium Carbonate - CaCO3)

Banded Gneiss

Gneiss (pronounced "nice")

Granite Gneiss

Gneiss (derived from granitic protolith)

Orange Calcite

Calcite (CaCO3)

Red Jasper

Silicon Dioxide (SiO2) with Iron impurities

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in calcitic matrix

Granite

Intrusive igneous felsic rock

Sandstone (with ripple marks)

Arenite / Quartz Sandstone

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate)

Biotite on Matrix

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Rose Quartz

Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Labradorite

Labradorite (Ca,Na)(Al,Si)4O8

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Granite

Phaneritic Plutonic Felsic Rock

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

Knightia Fossil in Limestone

Knightia eocaena in micritic limestone

Dyed Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite inclusions

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)

Snowflake Obsidian

Spherulitic Volcanic Glass (SiO2 + impurities)

Indigo Gabbro (also known as Mystic Merlinite)

Gabbro (composed of Plagioclase Feldspar, Pyroxene, and minor Magnetite/Ilmenite)

Garnet Rhyolite

Rhyolite (high-silica volcanic rock) with almandine/spessartine garnet