Dendritic Agate
Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)
mineral
Category
Organic Material (Likely A Fruit Or Berry)
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
Learn about Organic Material (Likely A Fruit Or Berry) in the encyclopedia
View all →
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Chert Concretion
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Amber Dragonfly Brooch
Succinited (Baltic Amber)
fossil
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions
mineral
Amber (Copal)
Succiniferous Resin
mineraloid
Precious Red Coral
Corallium rubrum / Corallium japonicum
mineral (organic gemstone)
Agate (Moss or Green Agate)
Silicon Dioxide (SiO2)
mineral
Amber
Succinate (Succinite for Baltic varieties)
Organic Mineraloid
Limestone (Tufa/Travertine)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Moss-covered Limestone with Quartz/Calcite Pocket
Calcium Carbonate (CaCO3) rock with biological moss coating
sedimentary
Sandstone with Brachiopod Mold Fossil
Sedimentary rock (Sandstone) with indeterminate Brachiopod mold
fossil
Concretion
Septarian Concretion (Fragmentary)
sedimentary
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Sandstone with Iron Oxide Concretion
Arenite with Hematite/Goethite Concretion
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (Fossilized Tree Resin), C10H16O
Organic Mineraloid
Amber (specifically Red or Cherry Amber)
Succinite (Resinite); Chemical formula: C10H16O
Mineraloid
Hag Stone
Perforated Sedimentary Rock (typically Limestone or Sandstone)
sedimentary
Limestone Cobble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Fossilized Shell Impression / Siltstone Fossil
Bivalvia / Brachiopoda mold in Siltstone
fossil
Moss Agate
SiO2 (Cryptocrystalline Quartz)
gemstone
Gastropod Internal Mold (Steinkern)
Class Gastropoda fossil mold (Phylum Mollusca)
sedimentary
Amber
Fossilized Tree Resin (Succinate)
mineral
Black Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Ironstone Nodules in Chalk/Limestone
Limonite/Goethite concretions (FeO(OH)·nH2O) in Calcium Carbonate matrix (CaCO3)
sedimentary
Amber and Tumbled Stones
Fossilized Tree Resin (Succinite)
fossil
Moss Agate
Silicon dioxide (SiO2) with mineral inclusions
Mineral
Chert / Flint (with Crinoid Stem Molds)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (approximate formula C10H16O)
mineraloid
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Moss Agate
Agate (Silicon Dioxide, SiO2) with dendritic inclusions
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of cellulose)
fossil
Fossiliferous limestone (likely crinoidal or shell limestone)
Calcite-rich limestone; predominantly CaCO₃, with visible fossil fragments
fossil
Chert (Flint) Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony / Agate with Botryoidal Quartz
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Sandstone Concretion (Ironstone Phosphorite)
Ferruginous Sandstone (variable Fe-oxide/hydroxide composition)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Grass (Organic Matter/Soil)
Poaceae (family of monocotyledonous flowering plants)
Organic Materia (Not a rock or mineral)