Travertine
Travertine (a terrestrial form of Limestone, CaCO3)
sedimentary
Category
Organic (Anthropogenic)
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Fossiliferous Limestone
Carbonate Rock (CaCO3 with organic inclusions)
sedimentary
Amber
Succinite (C10H16O)
gemstone
Manganese Dendrite on Siltstone
Manganese Oxide (pyrolusite or psilomelane) Dendrites
mineral/sedimentary
Amber
Succinate (Fossilized Tree Resin)
fossil
Amber (in Matrix/Shale)
Amber (Fossilized Tree Resin)
mineral
Chert Concretion / Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Turquoise and Red Coral
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Corallium rubrum (Red Coral)
mineral
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
sedimentary
Amber
Succinite
mineral
Fossiliferous Kalkstein (Marl/Sandstone)
Fossiliferous calcarenite/siltstone
sedimentary
Amber
Succiniferous organic material (Succinite)
fossil
Fossiliferous Limestone (Shell Fragment)
Biogenic Limestone (Calcium Carbonate / CaCO3)
sedimentary
Amber
Fossilized tree resin (Amorphous organic polymer)
gemstone
Fossiliferous Limestone
Calcium carbonate matrix with macrofossils (CaCO3)
fossil
Gravel / Limestone Fragment
Calcium Carbonate (CaCO3) / Fine-grained Sedimentary Rock
sedimentary
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
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
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
fossil
Amber
Succinates (Fossilized Resin)
mineral
Amber in Matrix
Succinite (Carbon-based organic polymer)
Organic (Sedimentary context)
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
Amber
Succinates (Organic Fossilized Resin)
mineral
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Amber
Succinite (organic fossilized resin)
mineraloid
Amber
Succinates (Organic compound: C10H16O)
mineraloid
Amber
Succinates (Organic Fossilized Resin)
mineraloid
Amber
Succinite (fossilized tree resin), C10H16O
Organic Gemstone
Amber (Copal)
Succinite (fossilized tree resin)
mineral
Fossiliferous Limestone / Petrifaction
Sedimentary rock with fossil inclusions / Calcium Carbonate (CaCO3)
fossil
Glauconitic Sandstone
Glauconitic Quartz Arenite (with K,Mg,Fe,Al silicate hydroxide)
sedimentary
Glauconitic Sanstone (Glauconite)
Glauconite ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Pearl
Calcium carbonate (CaCO3) + organic conchiolin
gemstone