Organic Materia (Not A Rock Or Mineral)

Pegmatite

Coarse-grained Igneous Rock (Granitic Pegmatite)

Jasper with Agate Inclusions

Jasper (Silicon Dioxide, SiO2) with Chalcedony/Agate

Amethyst (Tumbled)

Quartz (Silicon Dioxide, SiO2) with iron impurities

Granite

Granite (Silicic Plutonic Rock)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Opaque cryptocrystalline variety of Quartz

Sandstone (likely Quartzose)

Arenite (SiO2 principal mineral)

Desert Rose

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O) or Barite (Barium Sulfate, BaSO4)

Milky Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Milky Quartz Geode or Druzy Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky Pebble)

Silicon Dioxide (SiO2)

Folded Schist / Gneiss (Metamorphic Rock)

Regional Metaphoric Folded Outcrop (predominantly Schist/Gneiss)

Quartz Geode

Silicon Dioxide (SiO2) within a geode

Limonite (Yellow Ochre)

FeO(OH)·nH2O (Hydrous iron(III) oxide-hydroxide mixture)

Sandstone with Quartz Vein

Arenite with Quartz (SiO2) Infilling

Limestone

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Granite (Pegmatitic)

Phaneritic Felsic Igneous Rock

Basalt

Mafic Extrusive Igneous Rock

Rough Ruby

Corundum (Al2O3 with Chromium impurities)

Quartz / Chert

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Quartz Geode (River Cobble)

Silicon Dioxide (SiO2)

Chert (Flint Nobule)

Silicon Dioxide (SiO2)

Red Shale

Fissile Siliciclastic Sedimentary Rock

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (SiO2 with assorted lithic fragments)

Granite

Granite (Felsic Plutonic Rock)

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)

Mixed Silicates and Oxides (predominantly SiO2 group minerals)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)

Marble

Recrystallized Calcite Rock (CaCO3)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Pink Granite

Granite (Phaneritic intrusive rock)

Quartz Druzy on Basalt

Silicon Dioxide (SiO2) on Mafic Volcanic Rock

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Copper Ore with Malachite and Chrysocolla

Cu2CO3(OH)2 (Malachite) with Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)

Granitic Pegmatite

Granite (with coarse-grained Quartz, Feldspar, and Mica components)

Blue Lace Agate (with Amethyst Geode center)

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Breciated Chert

Brecciated Chert (Microcrystalline Quartz, SiO2)

Kimberlite

Kimberlite