Tiger Shark Fossil Tooth
Galeocerdo cuvier (fossilized)
sedimentary
Category
Mineral (Organic)
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Petrified Wood
Silicified Wood (SiO2)
fossil
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions
sedimentary
Tumbled yellow calcite
Calcite (CaCO₃), likely honey or lemon calcite
mineral
Polished agate-like stone (uncertain; possibly a fossil or shell fragment)
Likely microcrystalline quartz (chalcedony), SiO₂; exact identification is limited by the image
mineral
Polished/tumbled calcite
Calcite (calcium carbonate, CaCO₃)
mineral
Zebra Marble
Metamorphosed Limestone (Recrystallized Calcite)
metamorphic
Possible fossilized shell or coral fragment
Indeterminate biogenic carbonate, likely calcite (CaCO₃)
fossil
Fossilized Bone (Petrified Bone)
Permineralized Vertebrate Remains
sedimentary
Chert (Septarian Nodules-like)
Silicon dioxide (SiO2)
sedimentary
Chert (potentially Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Chert Concretion (Flint)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
sedimentary
Travertine (Tufa)
Chemical Sedimentary Rock (CaCO3)
sedimentary
Bivalve Fossil (Fossilized Shell)
Class Bivalvia (fossilized in Calcium Carbonate/Aragonite)
fossil
Fossil Coral
Scleractinia or Anthozoa (Fossilized)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Chert (often called Jasper in this color variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Dinosaur Fossil Tooth
Vertebrate Fossilized Tooth
fossil
Fossil Shark Tooth
Selachii (fossilized dentition)
fossil
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Fossilized Tiger Shark Tooth
Galeocerdo cuvier (fossilized hydroxylapatite)
sedimentary
Chert / Flint
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Chert (Jasper-like Silicate)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)
mineral
Banded Agate (specifically Moss Agate or Plume Agate variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Fossilized Coral
Cnidaria fossil / Calcite-replaced coral
fossil
Petrified Wood
Silicified wood (Quartz / Chalcedony replacement of organic cellulose)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Chert (often called Jasper or Flint)
Microcrystalline Silica (SiO2)
sedimentary
Chert (with Limestone matrix)
Silicon dioxide (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz, SiO2)
metamorphic
Shark Tooth Fossil
Otodus obliquus (or similar prehistoric lamniform shark tooth)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert with Quartz Veining
Silicon Dioxide (SiO2)
sedimentary