Marble

Fossilized Gastropod Shell

Gastropoda (Class)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Red Sandstone

Arenite (Ferruginous Sandstone)

Granite (Pegmatitic)

Phaneritic Felsic Igneous Rock

Fossiliferous Limestone

Calcite (CaCO3) with Bioclastic inclusions

Fossilized Blastoid

Pentremites (Class Blastoidea)

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Peridotite

Peridotite (varieties include Dunite, Lherzolite, Harzburgite)

Fossilized Coral

Anthozoa (Fossilized)

Diamond

Diamond (C)

Diamond

Diamond (C)

Uraninite (Pitchblende)

Uranium dioxide (UO2)

Ammonite Fossil

Ammonoidea (primarily composed of Calcite, CaCO3, or Pyrite)

Glauconitic Sandstone with possible Trace Fossil

Glauconitic Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Blue Aragonite

Aragonite (Calcium Carbonate, CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Basalt with Peridotite Inclusion

Mafic Volcanic Rock (Extrusive Igneous) with Ultramafic Xenolith

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)

Chert (containing small fossils)

Chert (Microcrystalline Quartz, SiO2)

Serpentine

Serpentinite (group of minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Turritella Agate (Elimia Agate)

Silicified Elimia tenera (formerly misidentified as Turritella)

Rugose Coral (Horn Coral) Fossil in Limestone

Order Rugosa (commonly Grewingkia or Zaphrentis genus)

Aragonite (variety 'Flos Ferri')

Aragonite (CaCO3)

Granite

Granite (composed primarily of Quartz (SiO2), Alkali Feldspar, and Plagioclase)

Fossiliferous Limestone

Sedimentary Calcium Carbonate (CaCO3)

Vesicular Basalt (Scoria)

Extrusive Mafic Volcanic Rock (FeO-SiO2-MgO)

Limestone

Calcium Carbonate (CaCO3)

Queen Conch Shell (Biogenic Calcium Carbonate)

Aliger gigas (synonym Strombus gigas); Composition: Aragonite (CaCO3)

Pumice

Pumice (Vesicular volcanic glass)

Pumice

Pumice (Vesicular Rhyolite/Andesite)

Limestone (Cliff Formation)

Limestone (predominantly CaCO3 as calcite)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Diamond

Diamond (C)

Diamond

Carbon (C)

Basalt pebble

Aphanitic Mafic Volcanic Rock (Fe/Mg rich)

Shale creek bed

Shale (fine-grained clastic sedimentary rock)