Rugose Coral Fossil
Rugosa (Order) / Horn Coral
fossil
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Pumice
Pumice
igneous
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate with Fossils)
sedimentary
Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Clastic sedimentary rock (Quartz arenite or Arkose)
sedimentary
Quartzite
Metamorphic quartz rock (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Fossil Coral
Scleractinia / Rugosa (Silicified Coral)
fossil
Chert with Iron Staining
Microcrystalline quartz (SiO2) with iron oxide inclusions
sedimentary
Greenstone / Greenschist
Greenschist facies metamorphic rock (composed primarily of chlorite, actinolite, and epidote)
metamorphic
Calcite
Calcium Carbonate (CaCO3)
mineral
Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)
Phylum Mollusca, Class Bivalvia
fossil
Quartz
Silicon Dioxide (SiO2)
mineral
Fossilized Echinoid (Sea Urchin) or Brachiopod
Echinoidea / Invertebrate Fossil
fossil
Basalt
Extrusive Igneous Rock
igneous
Fossil Coral
Hexagonaria or Rugose Coral (Fossilized Calcium Carbonate / Silica)
fossil
Fossilized Shark Tooth
Chondrichthyes (Class) fossilized tooth
fossil
Sandstone
Sedimentary Rock (Quartz/Feldspar grains cemented together)
sedimentary
Fossil Coral
Hexagonaria / Rugosa / Scleractinia
fossil
Carnelian
SiO2 (Silicon dioxide)
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Pumice
Pumice (Vesicular Felsic Igneous Rock)
igneous
Flint / Chert
Silicon dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Basalt
Extrusive Igneous Rock
igneous
Ammonite Fossil
Ammonoidea subclass (calcium carbonate / silica replacement)
fossil
Milky Quartz with Mica
Silicon Dioxide (SiO2) with Muscovite or Biotite inclusions
mineral
Granite
Felsic intrusive igneous rock
igneous
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Fluorite
Calcium Fluoride (CaF2)
mineral
Fossil Coral
Hexagonaria or Rugose Coral (petoskey stone / fossilized rugose or tabulate coral)
fossil
Quartz
Silicon Dioxide (SiO2)
mineral
Chert / Flint (Flaked Stone Tool / Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Pumice
Volcanic glass / Pumice
igneous
Jasper
Microcrystalline Quartz (SiO2) with iron oxide impurities
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock (composed mainly of quartz, alkali feldspar, and plagioclase)
igneous