Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite organic gemstone
mineral
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Amber
Fossilized Tree Resin (Generic formula: C10H16O)
mineral
Amber
Succinite (approximate formula C10H16O)
mineraloid
Amber
Succinite (specifically for Baltic amber); Fossilized Tree Resin (C10H16O)
Organic Mineraloid
Coprolite
Fossilized feces (various taxa)
sedimentary
Amber (specifically Cherry Amber)
Succinite (with the chemical formula C10H16O)
Organic Gemstone (not a mineral)
Amber
Succinicum (Organic compound, primarily C10H16O)
Organic Gemstone (Mineraloid)
Amber / Fossilized Resin
Succinite / Fossilized Tree Resin
mineral
Red Amber (Burmite/Cherry Amber)
Succinite / Retinite (Organic Fossilized Resin, C10H16O)
Mineraloid (Organic)
Dendritic Opal
Dendritic Common Opal (SiO2·nH2O with Manganese oxide inclusions)
mineral
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
sedimentary
Amber with inclusion
Amber (Fossilized Tree Resin)
mineral
Amber
Succinite (fossilized resin)
mineral
Amber and Citrine Quartz
Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)
mineral
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Rough Amber (likely Copal or immature Amber)
Organic gemstone / Succinite (if Baltic)
mineral
Amber
Succinite (specifically for Baltic amber); Approximate formula: C10H16O
Organic Gemstone (Mineraloid)
Amber
Succinite (a fossilized organic resin)
mineral
Amber
Succinite (specific to Baltic amber), fossilized tree resin
Organic Mineraloid
Sandstone
Clastic Sedimentary Rock (composed of SiO2 grains)
sedimentary
Tree Agate
Dendritic Chalcedony (SiO2)
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Dendritic Quartz
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Fulgurite
Fulgurite (Lechatelierite-rich variety)
metamorphic
Petoskey Stone (Fossilized Coral)
Hexagonaria percarinata (CaCO3)
sedimentary
Amber
Succinite (fossilized tree resin)
mineraloid
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Fossilized Horn Coral
Order Rugosa (Rugose Coral)
sedimentary
Amber
Succinite
Organic Mineraloid
Amber
Succinite (a common variety of fossilized resin)
mineral
Amber
Succinite (C10H16O)
mineraloid
Amber
Succinite
mineral
Baltic Amber (Butterscotch or Egg Yolk Variety)
Succinite (chemical formula: C10H16O)
Organic Gemstone (not a rock or mineral)
Fossilized Crinoid Stem Columnal
Phylum Echinodermata; Class Crinoidea (CaCO3)
sedimentary
Coquina or Fossiliferous Limestone
Fossiliferous Calcarenite (CaCO3)
sedimentary
Amber
Fossilized Tree Resin (C10H16O)
mineral
Amber
Succinite (Fossilized Tree Resin), C10H16O
Organic Mineraloid
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Quartz Conglomerate
Quartz Conglomerate (clastic sedimentary rock)
sedimentary
Fossilized Coral (Petoskey Stone or similar Favosites)
Hexagonaria percarinata / Favosites (Silurian-Devonian Coral)
sedimentary