Organic Material (Likely A Fruit Or Berry)

Fossil gastropod shell

Fossilized marine gastropod; exact genus/species cannot be determined from the image

Polished chalcedony (likely moss/ag ate)

Microcrystalline quartz, SiO₂; probable moss agate or jasper variety

Chert (with potential fossil inclusion)

Microcrystalline Quartz (SiO2)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Chert (specifically a weathered Chert nodule or fragment)

Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossilized Bone (Petrified Bone)

Permineralized Vertebrate Remains

Chert (River Cobble)

Chert (Cryptocrystalline Quartz, SiO2)

Chalcedony (Botryoidal or Tumbled)

Chalcedony (SiO₂)

Chalcedony in Matrix (likely Agatized Coral or Chert)

Silicon Dioxide (SiO2)

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Fossilized Shark Tooth

Chondrichthyes (Class) - likely Carcharodon or Otodus genus

Fossilized Shark Tooth (Eroded)

Carcharodon sp. or Otodus sp. fragment (likely)

Chert (and Petrified Wood)

Silicon Dioxide (SiO2)

Megalodon Shark Tooth (Partial Fossil)

Otodus megalodon (fossilized in Calcium Phosphate/Apatite)

Chert (specifically Jasper or Flint)

Cryptocrystalline Quartz (SiO2)

Chert (specifically Flint)

Silicon Dioxide (SiO2)

Chert Pebble

Microcrystalline Quartz (SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Sandstone (with potential fossil inclusions)

Clastic sedimentary rock (primarily SiO2)

Concrete or asphalt-like aggregate surface with a dark fragment

Uncertain; likely artificial concrete containing mixed lithic aggregate, not a natural rock

Petrified Wood

Silicified Wood (SiO2)

Ferruginous Sandstone (with possible trace fossils)

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3)

Chert (often called Flint or Agate nodule)

Cryptocrystalline Quartz (SiO2)

Limestone with Gastropod Fossil

Sedimentary Calcium Carbonate (CaCO3) with Gastropoda inclusion

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone with Algae Growth

Arenite with Chlorophyta/Lichen

Weathered limestone or calcareous fossil fragment

Calcite-rich carbonate rock (CaCO₃), possibly fossiliferous limestone

Chert (often called Flint or River Stone)

Microcrystalline Quartz (SiO2)

Chert (often called Flint or River Pebble)

Chert (Microcrystalline Quartz, SiO2)

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)

Fossil-bearing sedimentary rock, possibly fossil wood or bone

Indeterminate silicified/carbonate fossil in sandstone or mudstone

Amber

Succinite (fossilized tree resin)

Brown translucent mineral fragment, possibly iron-stained quartz or amber

Uncertain; likely quartz (SiO₂) with iron-oxide staining, though amber (fossilized resin) is possible

Chert (Jasper/Limonitic Chert)

Microcrystalline Quartz (SiO2)

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Fossilized Shark Tooth

Carcharhinus sp. (likely Bull or Requiem shark family)

Fossiliferous limestone

Bioclastic carbonate rock, predominantly calcite (CaCO₃)

Quartz vein in host rock

Quartz (SiO₂), likely in a weathered carbonate or sedimentary matrix

Polished black stone, likely shungite

Shungite; carbon-rich mineraloid composed mainly of amorphous carbon, with silica and other minerals

Petrified Wood

Silicified Wood (SiO2)