Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Category
Organic Mineraloid
Browse organic mineraloid specimens identified by the Rock Identifier community.
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Amber
Fossilized Tree Resin
gemstone
Flint with Fossil Inclusion
Cryptocrystalline quartz (SiO2) enclosing fossilized organic remains
sedimentary
Amber
Amber (Fossilized Tree Resin)
mineral
Moss Agate
SiO2
mineral
Amber Dragonfly Brooch
Succinited (Baltic Amber)
fossil
Shale with Iron Staining
Fissile Mudrock (Sedimentary Rock)
sedimentary
Precious Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
gemstone
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Fossiliferous Limestone
Carbonate Rock (CaCO3 with organic inclusions)
sedimentary
Amber
Succinite (C10H16O)
gemstone
Amber
Succinate (Fossilized Tree Resin)
fossil
Amber (in Matrix/Shale)
Amber (Fossilized Tree Resin)
mineral
Chert Concretion / Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Potassium-Rich Silicate Clay (inferred from biological context)
Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)
mineral
Travertine
Travertine (a terrestrial form of Limestone, CaCO3)
sedimentary
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
sedimentary
Turquoise and Red Coral
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Corallium rubrum (Red Coral)
mineral
Paper (Cellulose)
Cellulose (C6H10O5)n
Organic (Anthropogenic)
Amber
Succiniferous organic material (Succinite)
fossil
Fossiliferous Kalkstein (Marl/Sandstone)
Fossiliferous calcarenite/siltstone
sedimentary
Fossiliferous Limestone (Shell Fragment)
Biogenic Limestone (Calcium Carbonate / CaCO3)
sedimentary
Amber
Fossilized tree resin (Amorphous organic polymer)
gemstone
Mother of Pearl (Nacre) / Shell Fragment
Biogenic Calcium Carbonate (Aragonite and Conchiolin)
fossil
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Limestone Pebble with Crinoid Fossil
Calcium Carbonate (CaCO3) - Fossiliferous Limestone
sedimentary
Gravel / Limestone Fragment
Calcium Carbonate (CaCO3) / Fine-grained Sedimentary Rock
sedimentary
Fossiliferous Limestone
Calcium carbonate matrix with macrofossils (CaCO3)
fossil
Sedimentary Rock with Crafts (Pet Rock)
Sedimentary rock decorated with synthetic materials
sedimentary
Petrified Wood
Petrified Wood (Silicified Wood)
fossil
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
mineral
Pearl
Calcium carbonate (CaCO3) in the form of Aragonite or Calcite
mineral
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
fossil
Amber
Succinates (Fossilized Resin)
mineral
Pearl (Pendant)
Calcium Carbonate (Aragonite/Calcite) - CaCO3
gemstone
Amber
Succinite (fossilized tree resin)
fossil
Amber
Succinates (Fossilized Tree Resin)
fossil
Chert (and Fossilized Brachiopod shell)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Pink Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Amber
Succinates (Organic Fossilized Resin)
mineral
Amber
Succinite (fossilized tree resin), C10H16O
Organic Gemstone