Chert (Nodule)
Microcrystalline Quartz (SiO2)
Category
Browse organic gemstone (sedimentary associations) specimens identified by the Rock Identifier community.
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Chert
Silicon dioxide (SiO2)
Chert (specifically Flint or Common Opal)
Silicon Dioxide (SiO2)
Fossilized Plant or Tree Bark
Lepidodendron or Sigillaria (example genera)
Moss Agate and Hematite
Silica (SiO2) with fibrous inclusions of Manganese or Iron; Hematite (Fe2O3)
Fossilized Shell in Limestone
Bivalve fossil (CaCO3) in Carbonate Sedimentary Rock
Amber
Succinite (specific to Baltic amber), fossilized tree resin
Limestone (containing Fossil Mold)
Sedimentary Calcium Carbonate (CaCO3)
Limestone with Fossil Inclusion
Sedimentary Calcium Carbonate (CaCO3)
Amber
Succinite (fossilized tree resin)
Turquoise, Pearl, and Coral Necklace
CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
Travertine
Terrestrial Sedimentary Limestone (CaCO3)
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Bituminous Coal
Organic sedimentary rock (humic coal)
Sandstone Concretion
Limonitic Sandstone Concretion
Chert (Jasper variation)
Chert (Microcrystalline Silicon Dioxide, SiO2)
Sodalite
Na8(Al6Si6O24)Cl2 (Sodalite)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
Bituminous Coal
Bituminous coal (Organic Sedimentary Rock)
Chert (Flint)
Chert (SiO2)
Nephrite Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Fossiliferous Limestone
Fossiliferous Limestone
Chert (Beach Pebble)
Microcrystalline Quartz (SiO2)
Chert
Chert (Microcrystalline Quartz, SiO2)
Shell Cameo (Sardonyx Shell)
Cassis madagascariensis (Sardonyx shell)
Banded Chert
Sedimentary Cryptocrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Amber / Copal
Succinite (fossilized resin)
Bivalve Fossil in Sedimentary Matrix
Fossiliferous Mudstone (Class: Bivalvia)
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Fossilized Bone
Permineralized Vertebrate Fossil
Chert (Flint)
Microcrystalline Quartz (SiO2)