Glauconite (Greensand Articulated Sandstone)
Glauconite ((K, Na)(Fe, Al, Mg)2(Si, Al)4O10(OH)2)
Category
Browse anthropogenic sedimentary style organic solid specimens identified by the Rock Identifier community.
Glauconite (Greensand Articulated Sandstone)
Glauconite ((K, Na)(Fe, Al, Mg)2(Si, Al)4O10(OH)2)
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
Amber
Succinite (Fossilized Resin)
Jasper
Silicon Dioxide (SiO2) with impurities
Chert (specifically Jasper or Flint type)
Microcrystalline Quartz (SiO2)
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
Chert Pebble (Flint)
Microcrystalline/Cryptocrystalline Quartz (SiO2)
Petrified Wood
Silicified wood (Quartz variant, SiO2)
Chert with Druzy Quartz Geode
Microcrystalline Quartz (SiO2)
Limonite-stained Chert
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)
Chert (Septarian or Nodular variety)
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Chert / River Jasper
Microcrystalline Quartz (SiO2)
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
Chert (Flint Nodular)
Chert (Silicon dioxide, SiO2)
Chert (variations include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
Fossiliferous Limestone with Rugose Coral
Lithostrotionella (Limestone Matrix - CaCO3)
Red Jasper
Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions
Mixed Quartz and Jasper Pebbles
Silicon Dioxide (SiO2)
Amber
Succinite (specifically for Baltic amber; fossilized tree resin)
Anthracite Coal
Anthracite (Carbon based fossil fuel)
Red Jasper (possibly Petrified Wood)
Silicon Dioxide (SiO2) with Hematite inclusions
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
Chert (Nodule)
Microcrystalline quartz (SiO2)
Chert (with Quartz Druzy)
Microcrystalline Silica (SiO2)
Bivalve Fossil in Sedimentary Matrix
Fossiliferous Mudstone (Class: Bivalvia)
Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
Chert (Nodular Chert)
Silicon Dioxide (SiO2)
Chert (Flint Nodules)
Microcrystalline Quartz (SiO2)
Chert (Cherty Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (varieties include Flint and Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Chert (containing Calcite or Quartz inclusions)
Silicon Dioxide (SiO2) with varying mineral impurities
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Chert (Gravel Fragment)
Silicon dioxide (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclasts
Chert with Limestone Cortex
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
Chert
Microcrystalline Quartz (SiO2)