Black Pearl (Tahitian or Irradiated Type)
Organic gemstone (Calcium Carbonate with Conchiolin Binding)
mineraloid
Category
Mineral Like Biological Tissue
Browse mineral like biological tissue specimens identified by the Rock Identifier community.
Amber
Succinite (a fossilized organic resin containing succinic acid)
mineraloid
Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
metamorphic
Amber
Succinite (organic fossilized resin)
mineraloid
Fossil Bivalve Shell
Class Bivalvia (e.g., Veneriidae family)
sedimentary
Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
Organic Gemstone (Sedimentary classification)
Pearl (Cultured or Natural)
Aragonite (CaCO3) with Conchiolin
Organic Mineraloid
Pearl (Imitation or Cultured)
Calcium Carbonate (Aragonite/Calcite) - CaCO3
Mineraloid (Organic)
Amber
Succinite (Formula: C10H16O)
mineral
Belemnite (Fossilized Rostrum)
Belemnitida (Order), composed of Calcite (CaCO3)
sedimentary
Orange Tabby (Felis catus)
Felis silvestris catus (variety: Red Mackerel Tabby)
Organic/Biological specimen (Non-Mineral)
Calcite
Calcium Carbonate (CaCO3)
mineral
Bivalve Fossil (Internal Mold)
Class Bivalvia (Phylum Mollusca)
sedimentary
Aragonite (Onyx Marble)
Aragonite / Calcium Carbonate (CaCO3)
mineral
Sand Dollar Fossil (Echinoidea)
Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)
sedimentary
Fossil Shark Tooth (Otodus obliquus)
Otodus obliquus; hydroxyapatite (mineralized form Ca5(PO4)3(OH))
sedimentary (fossiliferous)
Bay Scallop Shell
Argopecten irradians (Biogenic Calcium Carbonate / CaCO3)
sedimentary
Amber
Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O
mineral
![Banded Iron Formation (BIF) / Tiger Iron (Ferruginous Chert (primarily Quartz [SiO2] and Hematite/Magnetite [Fe2O3/Fe3O4])) — metamorphic](https://media.rockidentification.com/2a815c02-b6be-44b2-aea2-3de93f046f91-thumbnail.jpg)
Banded Iron Formation (BIF) / Tiger Iron
Ferruginous Chert (primarily Quartz [SiO2] and Hematite/Magnetite [Fe2O3/Fe3O4])
metamorphic
Amber
Succinite (specifically for Baltic amber); Approximate formula: C10H16O
Organic Gemstone (Mineraloid)
Calcite
Calcium Carbonate (CaCO3)
mineral
Amber
Succinite
Organic Mineraloid
Amber
Succinite (fossilized resin, C10H16O)
mineral
Amber
Succinite (Fossilized Tree Resin)
Organic Mineraloid
Amber
Succinite (with formula approximately C10H16O)
Organic mineraloid
Amber
Succinicum (Organic Gemstone - Resinite)
mineraloid
Oak Wood (Wood Grain Pattern)
Quercus (genus)
Organic (Non-rock)
Amber
Succinite
Mineraloid
Amber
Succinite (specifically for Baltic amber); C10H16O (Variable organic compound)
mineral
Amber
Succinicum (Succinite); C10H16O
Mineraloid (Organic)
Belemnoit (Fossil)
Belemnoidea (Order), Rostrum / Guard
sedimentary
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
sedimentary
Piddock-bored Mudstone
Lutite (Siltstone or Mudstone) with Pholad borings
sedimentary
Pumice
Vesicular volcanic glass (primarily SiO2 with Al2O3)
Igneous
Anthracite Coal
Anthracite (Carbon Content: 86%-97%)
metamorphic
Amber
Succinite (Fossilized Tree Resin) - C10H16O
mineral
Biological Specimen (Domestic Dog)
Canis lupus familiaris
Organic (Non-rock)
Fossiliferous Limestone
Calcareous biomicrite / Calcium Carbonate (CaCO3)
sedimentary
Chert (often called Flint or River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Coralline Algae / Maerl
Lithothamnion (Biogenic Calcium Carbonate)
sedimentary
Hag Stone
Perforated Sandstone (composed of SiO2 and calcareous cement)
sedimentary