Anthropogenic Sedimentary Style Organic Solid

Banded Chert with Quartz Veining

Microcrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)

Fossil Coral (Rugose Coral Fragment)

Rugosa (extinct order of solitary and colonial corals)

Rough Amber (likely Copal or immature Amber)

Organic gemstone / Succinite (if Baltic)

Zebra Stone (Banded Chert or Limestone)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Fossiliferous Limestone (Coquina / Shell Limestone)

Bioclastic Limestone (CaCO3)

Petrified Wood

Siliconized Wood (SiO2)

Fossilized Fish Skeleton in Matrix

Vertebrata (Class: Actinopterygii), typically found in limestone or shale matrices

Septarian Nodule

Septarian Concretion (CaCO3 + Hydrated SiO2)

Chert (River Pebble)

Silicon Dioxide (SiO2)

Chert / River Stone

Microcrystalline Quartz (SiO2)

Banded Chert

Microcrystalline Quartz (SiO2)

Chert (Flint)

Chert (Microcrystalline Silica, SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (specifically a weathered Chert nodule or fragment)

Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)

Coral Fossil (Scleractinia)

Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)

River Stone (Chert/Siltstone)

Cryptocrystalline Quartz (SiO2) with trace impurities

Fossil Shark Tooth

Carcharodon or Carcharias fossil (Vertebrate Fossil)

Chert (Yellow Jasper variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (often referred to as Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (often called Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint or Jasper)

Cryptocrystalline quartz (SiO2)

Fossiliferous Limestone

CaCO3 (principally Calcite or Aragonite)

Chert (with Quartz Veining)

Microcrystalline silicon dioxide (SiO2)

Banded Chert

Microcrystalline Quartz (SiO2)

Chert (Beach Pebble)

Silicon Dioxide (SiO2)

Yellow Chert (Jasper)

Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained)

Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)

Chert (varieties include Flint and Jasper)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained)

Chert / Microcrystalline Silicon Dioxide (SiO2)

Chert (White Chert or Flint)

Microcrystalline or cryptocrystalline quartz (SiO2)

Chert (Fossiliferous)

Silicon Dioxide (SiO2)

Chert (Tan/Grey)

Chert (Silicon Dioxide, SiO2)

Chert (variations include Flint/Jasper)

Chert (SiO2)

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Chert

Chert (SiO2)

Chert

Microcrystalline Quartz (SiO2)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (Quartz Variety)

Chert (SiO2)

Petrified Wood

Silicified Wood (SiO2)