Man Made Composite (Lithified Equivalent Of Sedimentary)

Chert (Limestone-based)

Silicon dioxide (SiO2)

Montana Moss Agate

Chalcedony (SiO2) with Manganese/Iron oxide inclusions

Coquina / Fossiliferous Limestone

Fossiliferous Calcarenite (Calcium carbonate, CaCO3)

Granite

Phaneritic Felsic Igneous Rock

Fossilized Angel Wing Shell

Cyrtopleura costata

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Carnelian

Chalcedony (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Banded Black Onyx (Chalcedony)

Silicon Dioxide (SiO₂)

Blue Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Fossiliferous Limestone with Rugose Coral

Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)

Hag Stone

Calcareous sedimentary rock (often Chert, Flint, or Limestone)

Dendritic Siltstone (or Mudstone)

Siltstone with Manganese Oxide dendrites

Chert (Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossil / Permineralized Bone

Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)

Jasper (specifically Polychrome or Desert Jasper)

Silicon Dioxide with impurities (SiO2)

Agate (River Pea)

Microcrystalline Chalcedony (SiO2)

Chert (Agate/Flint variant)

Microcrystalline Quartz (SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Petrified Wood

Silicified Wood (primarily SiO2)

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Limestone

Calcium Carbonate (CaCO3)

Map Jasper (Grey Picasso Jasper)

Silicon Dioxide (SiO2) with impurities

Chert (Flint)

Microcrystalline Quartz (SiO2)

Fossilized Coral

Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Vuggy Quartz on Matrix

Silicon Dioxide (SiO2)

Coral Fossil (Favosites)

Favosites (Calcite/Calcium Carbonate, CaCO3)

Jasper (Petrified Wood Variety)

Silicon Dioxide (SiO2)

Black Jasper

Silicon Dioxide (SiO2) with Carbonaceous inclusions

Blue Kyanite

Kyanite (Al2SiO5)

Quartz (Milky Quartz)

Silicon Dioxide (SiO₂)

Marble

Recrystallized Calcite / Dolomite (CaCO3)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Chert (Black Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and Limestone)

Chert (consisting of Microcrystalline Quartz, SiO2)

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Petrified Wood

Silicified Wood (primarily Chalcedony/Quartz, SiO2)

Jasper pebble

Jasper (Silicon Dioxide, SiO2)

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Chert (specifically Banded Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2)