Rock

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt)

Porphyritic Basalt (primarily SiO2, Al2O3, FeO, MgO, CaO)

Garnet Schist

Almandine-Garnet Mica Schist

Sandstone

Arenite (primarily SiO2)

Basalt (Vesicular)

Basalt (Mafic Extrusive Igneous Rock)

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone

Arenite (SiO2 based with various cements)

Chert (with Quartz Vein)

Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)

Granite

Granite (a felsic intrusive igneous rock)

Sandstone

Arenite (primarily SiO2)

Pumice

Pumice (Amorphous volcanic glass)

Basalt

Basalt (primarily composed of Plagioclase feldspar and Pyroxene)

Geode with Iron-Stained Quartz/Calcite

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix

Basalt (Vesicular)

Basalt (Mafic Extrusive Igneous Rock)

Basalt

Mafic volcanic rock (Primary minerals: Plagioclase feldspar, Pyroxene)

Basalt

Extrusive Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Sandstone (Quartzose Pebble)

Clastic sedimentary rock (primarily SiO2)

Basalt with Vesicular Texture (Beach Cobble)

Vesicular Basalt (Aphanitic Igneous Rock)

Sandstone (Red/Brown Variety)

Arenite (SiO2 with iron oxide impurities)

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)

Agate Geode

Banded Chalcedony (Silicon Dioxide, SiO2) with Quartz crystals

Sandstone (Ferruginous)

Arenite with Iron-oxide inclusions (SiO2 primarily)

Banded Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Chert (Brown variety / Common Jasper)

Microcrystalline Quartz (SiO2)

Goniatite Fossil

Goniatitida (Order), fossilized in limestone/calcite (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Schist (Biotite Schist)

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

Schist

Mica Schist

Blue Lace Agate (Geode/Druzy variant)

Chalcedony (SiO2) with Quartz druzy

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Quartz (Milky/Clear Quartz)

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated Iron Oxide)

Dumortierite Quartz (Blue Quartz)

Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)

Quartzite

Quartzite (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Conglomerate (Asphaltic/Anthropogenic)

Clastic sedimentary rock / Bituminous mixture

Petrified Wood

Silicified Wood (SiO2)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Septarian Nodule Segment (Commonly known as Dragon Stone or Lightning Stone)

Septarian Nodule (CaCO3 / Hydrated Calcium Carbonate)