Crushed Limestone
Calcium Carbonate (CaCO3)
sedimentary
Category
Igneous And Fossil
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Amber
Succinite (C10H16O)
mineral
Amber
Succinite (Fossilized Tree Resin)
Organic Mineraloid
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Tufa (Limestone)
Calcareous Tufa (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
mineral
Limestone with Calcite Crust
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Siltstone
Siltstone (composed of clastic quartz and feldspar)
sedimentary
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Limestone Pebble
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclastic Inclusions
sedimentary
Sandstone (lithic/arkosic)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Red)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)
sedimentary
Fossiliferous Limestone with Rugose Coral
Calcite (CaCO3) containing a Rugosa (Horn Coral) fossil
sedimentary
Fossilized Shark Tooth (Cretaceous to Neogene)
Elasmobranchii dental fossil (likely Squalicorax or similar species)
mineral (biogenic replacement)
Vuggy Quartz / Chert
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Coquina or Fossiliferous Limestone
Fossiliferous Calcarenite (CaCO3)
sedimentary
Queen Conch Shell (Biogenic Calcium Carbonate)
Aliger gigas (synonym Strombus gigas); Composition: Aragonite (CaCO3)
mineral
Coquina
Biogenic Limestone (Calcite, CaCO3)
sedimentary
Chert (Yellow or Tan variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO₂ / Silicon Dioxide)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Shale
Argillaceous Sedimentary Rock
sedimentary
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Shale
Shale (Argillaceous sedimentary rock)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Shale with Siltstone layering
Sedimentary Clastic Rock (Mudstone/Shale)
sedimentary
Chert (Field Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Ferruginous Sandstone
Sandstone with iron oxide (Hematite/Limonite) cement
sedimentary