Pearl
Nacre (primarily aragonite, CaCO₃, in an organic conchiolin matrix)
Category
Browse organic gemstone (succinite) specimens identified by the Rock Identifier community.
Pearl
Nacre (primarily aragonite, CaCO₃, in an organic conchiolin matrix)
Pearl strand
Nacreous pearl, primarily aragonite (CaCO₃) with conchiolin protein
Melo Melo Pearl (or Golden Chalcedony / Yellow Jasper Sphere)
Non-nacreous calcium carbonate pearl (or SiO2 - Silicon Dioxide)
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
Pearl
Nacre (Aragonite and Conchiolin), CaCO3
Red Coral (Precious Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
Precious Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
Amber
Succinates (Fossilized Tree Resin)
Amber
Succinit (C10H16O)
Pearl
Calcium carbonate (CaCO3) in the form of Aragonite or Calcite
Amber
Fossilized Tree Resin (C10H16O)
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
Green Chert
Microcrystalline Quartz (SiO2)
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite organic gemstone
Honey-colored amber (likely copal or amber fragment)
Amber: fossilized plant resin; commonly succinite (C₁₀H₁₆O)
Red Jasper
Silicon Dioxide (SiO2)
Green Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
Amber
Fossilized Tree Resin (C10H16O)
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
Freshwater Pearl
Calcium Carbonate (CaCO3) in the form of Aragonite and Calcite
Amber jewelry (possibly amber-colored glass or resin)
Amber — fossilized plant resin, chiefly composed of polymerized terpenoids; the pictured material cannot be confirmed from the image
Amber
Fossilized Tree Resin
Amber
Succinicum (Organic compound, primarily C10H16O)
Red coral cabochon (likely dyed or reconstructed coral)
Corallium rubrum or other calcareous coral; chiefly aragonite (CaCO₃)
Natural freshwater pearls
Pearl (nacreous calcium carbonate; chiefly aragonite, CaCO₃)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
Fossilized Coral (Petrified Coral)
Lithostrotionella (example genus) / Scleractinia
Pearl
Calcium Carbonate (primarily Aragonite and Calcite), CaCO3
Amber
Succinate (Fossilized Tree Resin)
Chert
Microcrystalline Quartz (SiO2)
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Amber
Succinicum (Organic polymer, largely C10H16O)
Amber
Fossilized Tree Resin
Precious Coral
Corallium rubrum (Calcium carbonate with trace carotene)
Pearl (with Peridot)
Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4
Fossil Coral / Crinoid Stem section
Anthozoa / Crinoidea fossil
Pearl
Calcium Carbonate (Aragonite) with Conchiolin; formula: CaCO3
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (Jasper/Flint)
Microcrystalline Quartz (SiO2)
Amber
Succinicum (Formula: C10H16O)