Sedimentary (Silicified Fossiliferous Chalcedony)

Orbicular jasper (orbicular chert), likely ocean jasper

Silicified microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and/or clay-rich orbicules

Fossiliferous Sedimentary Rock (Coquina/Limestone)

Fossiliferous Calcarenite / Bioclastic Limestone

Fossiliferous Shale

Sedimentary Clastic Rock with fossil inclusions (likely Brachiopod or Bivalve impressions)

Brecciated jasper

Silicified breccia, chiefly microcrystalline quartz (SiO₂) with iron-oxide pigments

Blue-gray quartz-bearing rock, likely rough chalcedony or silicified host rock

Microcrystalline quartz (SiO₂), possibly with iron-oxide staining and minor feldspar/clay minerals

Limestone (Fossiliferous)

Calcium Carbonate (CaCO3)

Polished red jasper

Jasper, microcrystalline quartz (SiO₂) colored by iron oxides

Weathered agate or chalcedony nodule

Microcrystalline quartz (SiO₂), likely agate/chalcedony with iron-oxide staining

Fossiliferous limestone

Bioclastic limestone, chiefly calcite (CaCO₃)

Chrysocolla (with Quartz and Malachite)

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Fossiliferous Limestone

Calcium Carbonate (CaCO3) - Limestone

Polished fossiliferous agate

Chalcedony (microcrystalline SiO₂), likely fossil-bearing agate

Fossil Bone Fragment

Petrified bone (permineralized hydroxyapatite)

Chrysocolla

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O

Chert or flint

Microcrystalline quartz (SiO₂), commonly chalcedony with possible opal or clay impurities

Polished fossil coral (likely agatized coral)

Fossilized colonial coral; commonly silicified as chalcedony/quartz (SiO₂)

Petrified Wood

Silicified Wood (SiO2 - primarily Quartz/Chalcedony/Opal)

Yellow jasper / silicified breccia

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide staining and possible breccia fragments

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous limestone pebble

Calcite-rich limestone containing possible brachiopod or coral fossil impressions

Coprolite

Fossilized feces (various taxa)

Turritella Agate / Fossiliferous Limestone

Elimia tenera in Chalcedony/Calcite Matrix

Fossilized wood or plant fragment

Petrified wood (silicified fossil wood; commonly Araucarioxylon or related taxa)

Quartz-rich translucent fragment

Quartz, silicon dioxide (SiO₂), possibly chalcedony or vein quartz

Limestone

Limestone (CaCO3)

Fossiliferous limestone (likely a crinoidal or shell-fragment limestone)

Bioclastic limestone, composed chiefly of calcite (CaCO₃)

Petrified Wood

Silicified wood (permineralized wood)

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony; mainly SiO₂ with iron-oxide inclusions

Petrified wood

Silicified wood; commonly quartz/chalcedony (SiO₂) replacing organic tissue

Limestone

Calcium Carbonate (CaCO3)

Weathered fossilized wood (likely petrified wood)

Silicified wood; commonly quartz/chalcedony replacing wood tissue (SiO₂)

Fossiliferous Sandstone

Sedimentary rock containing invertebrate fossils

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood (SiO2 - Silicon Dioxide)

Fossiliferous Limestone

Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)

Fossil Assortment and Geological Specimens

Various (including Ammonoidea)

Petrified Wood

Silicified Wood (primarily quartz/chalcedony replacing organic wood structure, SiO2)

Fossiliferous Limestone

Carbonate sedimentary rock (CaCO3)

Fossiliferous Limestone

Calcium carbonate matrix with macrofossils (CaCO3)

Fossilized wood (petrified wood)

Silicified wood; commonly quartz/chalcedony (SiO₂) replacing wood tissue

Polished ocean jasper

Silicified rhyolite/chalcedony aggregate (primarily microcrystalline SiO₂)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)