Anthropogenic Material (Man Made Rock)

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Mica Schist

Mica Schist (primarily Muscovite or Biotite)

Jasper (Imperial Jasper style)

Silicon Dioxide (SiO2) with impurities

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Riverstone Quartzite (Water-worn Siltstone/Quartzite)

Metamorphosed Quartz-rich Arenite (SiO2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Fulonite (Fulgurite-like)

Fulgurite (SiO2 fused silica/lechatelierite)

Chert / Flint

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Diorite

Diorite (Intermediate intrusive igneous rock)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Schist

Mica Schist

Bloodstone

Heliotrope (cryptocrystalline Quartz, SiO2 with inclusions of Hematite)

Quartzite

Quartzite (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Sandstone (Pebble/Conglomerate fragment)

Sandstone (clastic sedimentary rock)

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide impurities

Basalt

Basalt

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(F,OH)2

Quartzite with Hematite

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)

Granite

Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O

Lapis Lazuli

Lapis Lazuli (Aggregate primarily of Lazurite: (Na,Ca)8(AlSiO4)6(S,SO4,Cl,1-2) with Calcite and Pyrite)

Quartz Mica Schist

Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)

Leopard Skin Jasper

Orbicular Rhyolite (Silicon Dioxide with various impurities)

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Quartz (Grain)

Silicon Dioxide (SiO2)

Amethyst Geode

Amethyst (Silicon Dioxide), Formula: SiO2

Granite Pebble (Salt and Pepper Granite)

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Biotite/Amphibole)

Quartzite Cobble

Quartzite (SiO2)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Quartz Geode/Cluster

Quartz (SiO2)

Sandstone (specifically Arkose or Ferruginous Sandstone)

Sandstone (SiO2 with iron oxide inclusions)

Brachiopod Fossil in Limestone

Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)

Nuummite

Nuummite (ortho-amphibole rock)

Chert (Commonly known as Flint)

Microcrystalline Quartz (SiO2)

Orange Quartzite (Tumbled Beach Pebble)

Quartzite (primarily SiO2)

Chalcedony (Agate/Carnelian variant)

Silicon Dioxide (SiO2)

Biotite Mica in Host Rock

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

Chert (with Quartz veins)

Microcrystalline Quartz (SiO2)

Granite (specifically Rapakivi Granite)

Phaneritic Felsic Igneous Rock (Granite)