Pearl (incorporated into jewelry)
Aragonite and Calcite (CaCO3)
mineral
Category
Organic (Biological Organism)
Browse organic (biological organism) specimens identified by the Rock Identifier community.
Fossiliferous Limestone
Calcareous biomicrite / Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (with approximate formula C10H16O)
mineraloid
Black Pearl (Tahitian Type)
Aragonite / Pinctada margaritifera (CaCO3 + Conchiolin)
Organic Gemstone
Amber
Succinite (fossilized resin)
mineral
Amber
Succinite (specifically for Baltic amber); Complex mixture of organic compounds (C10H16O)
Organic Mineraloid
Amber
Succinurite (C10H16O)
mineraloid
Amber
Fossilized Tree Resin (Succinate)
mineral
Pumice
Pumicite (Amorphous glass with varying chemical composition, often rhyolitic)
Igneous
Fossil Shark Tooth (Otodus obliquus)
Otodus obliquus; hydroxyapatite (mineralized form Ca5(PO4)3(OH))
sedimentary (fossiliferous)
Amber
Succinite (specifically for Baltic amber); Approximate formula: C10H16O
Organic Gemstone (Mineraloid)
Chert (Cherty Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O
mineraloid
Amber
Succinite (fossilized resin, C10H16O)
mineral
Pearl
Calcium Carbonate (CaCO3) + Conchiolin
mineral
Aragonite (Star Cluster or Twinned variety)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Amber
Succinite (Formula: C10H16O)
mineral
Amber (Rough)
Amber (Fossilized Tree Resin, succinite)
mineral
Fossilized Crinoid Stem
Class Crinoidea (Echinodermata)
sedimentary
Amber
Succinite (fossilized resin)
mineral
Amber
Succinite
mineraloid
Limestone (Concretionary or Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
Mineraloid
Amber
Succinite (C10H16O)
mineraloid
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Amber
Succinite (a fossilized organic resin containing succinic acid)
mineraloid
Amber
Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O
mineral
Amber
Succinite (approximate formula C10H16O)
mineraloid
Amber
Succinite (Resinous fossilized tree sap)
Mineraloid
Pearl
Pearl (Calcium Carbonate with organic conchiolin, CaCO3)
mineral
Chert (Siliceous Mudstone variant)
Microcrystalline quartz (SiO2)
sedimentary
Sand Dollar Fossil (Echinoidea)
Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)
sedimentary
Fossiliferous Limestone (Gritstone/Marl)
CaCO3 (Calcium Carbonate) with Fossil Inclusions
sedimentary
Amber
Succinite (fossilized resin)
Organic Mineraloid
Amber
Succinite (specific to Baltic amber), fossilized tree resin
mineraloid
White Coral
Corallium rubrum (biocarbonate calcium) / CaCO3
mineral
Chert Nodule (Fossiliferous Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified wood (principally Silicon Dioxide, SiO2)
sedimentary
Limestone (Cliff Formation)
Limestone (predominantly CaCO3 as calcite)
Sedimentary
Amber / Fossilized Resin
Succinite / Fossilized Tree Resin
mineral
Chert (Iron-stained)
Microcrystalline silica (SiO2) with trace Iron oxide (Fe2O3)
sedimentary
Amber
Succinite (Fossilized Tree Resin)
Organic Mineraloid