Sedimentary (Silicified Fossiliferous Chalcedony)

Brecciated quartz-rich rock, possibly silicified breccia

Silica-rich breccia; chiefly microcrystalline quartz (SiO₂), with possible calcite and iron-oxide staining

Leopard Skin Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Oyster Shell (Biogenic Calcium Carbonate)

Crassostrea virginica (or related species) - Calcium Carbonate (CaCO3)

Petrified Wood

Silicified wood, primarily composed of Quartz (SiO2)

Fossiliferous Limestone containing a Brachiopod or Mollusk Impression

Biogenic Sedimentary Rock / Fossiliferous Limestone

Orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony, commonly called Ocean Jasper; predominantly SiO₂ with iron-oxide inclusions

Polished agate/jasper pebble (probable)

Microcrystalline quartz, SiO₂, with iron-oxide and other inclusions

Petrified Wood

Silicified Wood (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Limestone (or Bryozoan/Coral Fossil Pebble)

Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)

Weathered shale or mudstone

Clastic mudrock, chiefly clay minerals, quartz, and feldspar

Fossilized Shell or Coral Fragment in Matrix

Invertebrate Fossil in Sedimentary Rock

Fossiliferous Limestone (Coquina)

Calcite (CaCO3) with Bioclastic inclusions

Agatized Dinosaur Bone

Permineralized Dinosaur Bone (Silicified/Agatized Bone)

Fossiliferous Limestone (Crinoidal Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Polished fossilized wood (petrified wood), likely agatized

Silicified wood; predominantly microcrystalline quartz/chalcedony (SiO₂), with iron-oxide coloration

Limestone

Calcium Carbonate (CaCO3)

Petrified Wood

Silicified wood (primarily quartz, SiO2)

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Fossiliferous Limestone (Murchisonia/Gastropod Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Weathered limestone

Limestone; predominantly calcite (CaCO₃)

Quartz-rich breccia (likely silicified fault breccia)

Silica-cemented polymictic breccia; primarily quartz (SiO₂) with possible feldspar, mica, and mafic rock fragments

Likely weathered quartz-bearing rock fragment

Provisional identification: quartz-rich sandstone or microcrystalline quartz (SiO₂)

Liesegang Rings (in Sandstone or Siltstone)

Ferruginous Sandstone with Liesegang Banding

Petrified Wood (Jet or Coalified Wood appearance)

Silicified wood (principally SiO2) or Carbonized Wood

Fossiliferous Limestone Pebble

Sedimentary Rock (CaCO3)

Calligraphy Stone

Fossiliferous Limestone (containing Hematite and Shells)

Weathered fossil-bearing limestone

Limestone, predominantly calcite (CaCO₃), possibly fossiliferous or brecciated

Orbicular jasper (likely ocean jasper)

Silica-rich microcrystalline quartz/chalcedony with feldspar and accessory minerals; composition varies

Fossilized Oyster Shell (Limestone/Coquina)

Crassostrea (Fossilized Bivalve), Calcium Carbonate (CaCO3)

Jasper

Microcrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Fossiliferous limestone

Bioclastic carbonate rock, chiefly calcite (CaCO₃), containing fossil fragments—possibly coral or bryozoan

Light-colored limestone fragment

Limestone, predominantly calcite (CaCO₃), possibly micritic or fossiliferous

Limestone

Calcium Carbonate (CaCO3)

Favosites (Fossil Coral)

Favosites (Extinct Tabulate Coral)

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions

Fossil Coral (Silicified)

Anthozoa (Silicified Scleractinia or Tabulata)

Polished fossil-bearing limestone

Fossiliferous micritic limestone, likely containing gastropod or ammonoid fragments

Fossil-bearing limestone

Bioclastic limestone, likely containing a brachiopod or bivalve imprint

Calcite-rich limestone

Limestone, predominantly calcium carbonate (CaCO₃), usually calcite