Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)

Agate

Chalcedony (SiO2)

Quartz

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (Chalcedony), SiO2

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Labradorite (Gray Tumbled)

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

Blue Calcite

Calcium Carbonate (CaCO3)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Quartzite

Metamorphic Rock (Quartzite), primarily SiO2

Quartzite Cobble

Metamorphosed sandstone (SiO2)

Quartzite

Quartzite (primarily SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Orange Calcite

Calcium Carbonate (CaCO3)

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Basalt River Pebble

Basalt

Graphite

Graphite (C)

Pyrite

Iron Sulfide (FeS2)

Ruby

Corundum (Al2O3 with Chromium impurities)

Nephrite Jade

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

Greenstone

Greenschist / Greenstone (contains epidote, chlorite, and actinolite)

Chalcedony (Common Agate)

Silicon Dioxide (SiO₂)

Granite

Plutonic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)

Vesicular Basalt (Scoria)

Extrusive Mafic Volcanic Rock (FeO-SiO2-MgO)

Pumice (specifically a water-worn, weathered variety)

Vesicular volcanic glass

Agate

Silicon dioxide (Chalcedony), SiO2

Limestone Pebble

Limestone (Calcium Carbonate, CaCO3)

Corundum (Sapphire in Host Rock)

Corundum (Aluminum Oxide, Al2O3)

Rough Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Serpentinite

Serpentinite (composed largely of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile: Mg3Si2O5(OH)4)

Agate

Chalcedony (Cryptocrystalline variety of Quartz, SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Bauxite (Concretionary)

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

Unopened Geode

Geode (containing various mineralization like Quartz SiO2)

Serpentinite

Serpentinite (composed primarily of serpentine group minerals including antigorite, chrysotile, and lizardite)

Quartz (Milky/Yellowish)

Silicon Dioxide (SiO2)

Granite

Phaneritic intrusive igneous rock (Composition: Quartz, Feldspar, Mica)

Rainbow Moonstone

White Labradorite (Feldspar variety)

Dalmatian jasper

Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions