Pyrite
Iron Sulfide (FeS2)
mineral
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Pyrite
Iron Sulfide (FeS2)
mineral
Shark Tooth Fossil
Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)
fossil
Blue Celestite
Celestine (SrSO4)
mineral
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Vanadinite
Pb5(VO4)3Cl
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
mineral
Granite
Intrusive Igneous Rock
igneous
Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Seashell Fossil
Invertebrate fossil (phylum Mollusca)
fossil
Coral Fossil
Scleractinia (Fossilized Coral)
fossil
Fossilized Brachiopod or Gastropod in Chert/Limestone
Phylum Brachiopoda / Mollusca
fossil
Seashell (Cone Snail Shell)
Conus sp. (Calcium Carbonate, CaCO3)
fossil
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Fossil Seashell
Invertebrate fossil (Bivalvia)
fossil
Cockle Shell Fossil
Cardiidae family (Bivalvia)
fossil
Tumbled White Quartz
Silicon Dioxide (SiO2)
mineral
Fossil Sea Urchin / Echinoid
Class Echinoidea
fossil
Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Seashell Fossil
Invertebrate Bivalve / Gastropod Fossil (Calcium Carbonate, CaCO3)
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pink Granite Pebble
Granite
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Citrine
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Coral Fossil (or Tumbled Shell/Coral fragment)
Anthozoa (Fossilized Coral)
fossil
Pumice
Pumice (Volcanic Glass Foam)
igneous
Tiger's Eye
Silicon Dioxide (Quartz with crocidolite inclusions), SiO2
gemstone
Quartz Crystal Cluster / Quartzite
Silicon Dioxide (SiO2)
mineral
Fossil Shell (Bivalve)
Phylum Mollusca, Class Bivalvia
fossil
Fossil Shell (Bivalve)
Class Bivalvia (fossilized)
fossil